dwww Home | Manual pages | Find package

TLMGR(1)              User Contributed Perl Documentation              TLMGR(1)

NAME
       tlmgr - the native TeX Live Manager

SYNOPSIS
       tlmgr [option...] action [option...] [operand...]

DESCRIPTION
       tlmgr manages an existing TeX Live installation, both packages and
       configuration options.  For information on initially downloading and
       installing TeX Live, see <https://tug.org/texlive/acquire.html>.

       The most up-to-date version of this documentation (updated nightly from
       the development sources) is available at
       <https://tug.org/texlive/tlmgr.html>, along with procedures for updating
       "tlmgr" itself and information about test versions.

       WARNING: tlmgr in Debian runs always in user mode

       TeX Live is organized into a few top-level schemes, each of which is
       specified as a different set of collections and packages, where a
       collection is a set of packages, and a package is what contains actual
       files.  Schemes typically contain a mix of collections and packages, but
       each package is included in exactly one collection, no more and no less.
       A TeX Live installation can be customized and managed at any level.

       See <https://tug.org/texlive/doc> for all the TeX Live documentation
       available.

EXAMPLES
       After successfully installing TeX Live, here are a few common operations
       with "tlmgr":

       "tlmgr option repository ctan"
       "tlmgr option repository https://mirror.ctan.org/systems/texlive/tlnet"
           Tell  "tlmgr" to use a nearby CTAN mirror for future updates; useful
           if you installed TeX Live from  the  DVD  image  and  want  to  have
           continuing updates.  The two commands are equivalent; "ctan" is just
           an alias for the given url.

           Caveat: "mirror.ctan.org" resolves to many different hosts, and they
           are not perfectly synchronized; we recommend updating only daily (at
           most),  and  not  more  often. You can choose a particular mirror if
           problems; the list of all CTAN mirrors with the status of each is at
           <https://ctan.org/mirrors/mirmon>.

       "tlmgr update --list"
           Report what would be updated without actually updating anything.

       "tlmgr update --all"
           Make your local TeX  installation  correspond  to  what  is  in  the
           package repository (typically useful when updating from CTAN).

       "tlmgr info" what
           Display  detailed  information  about  a  package  what, such as the
           installation status and description, of searches  for  what  in  all
           packages.

       "tlmgr bug" what
           Display  available  bug-reporting information for what, a package or
           file name.

       For all the  capabilities  and  details  of  "tlmgr",  please  read  the
       following voluminous information.

OPTIONS
       The following options to "tlmgr" are global options, not specific to any
       action.   All  options,  whether global or action-specific, can be given
       anywhere on the command line, and in any order.   The  first  non-option
       argument  will  be  the  main  action.   In  all  cases,  "--"option and
       "-"option are equivalent, and an "=" is optional between an option  name
       and its value.

       --repository url|path
           Specify  the  package  repository  from  which  packages  should  be
           installed or updated, either a local directory or network  location,
           as  below. This overridesthe default package repository found in the
           installation's TeX Live Package Database (a.k.a. the TLPDB, which is
           given entirely in the file "tlpkg/texlive.tlpdb").

           This "--repository" option changes the location only for the current
           run; to make a permanent change, use "option  repository"  (see  the
           "option" action).

           As  an  example,  you  can  choose  a  particular  CTAN  mirror with
           something like this:

             -repository http://ctan.example.org/its/ctan/dir/systems/texlive/tlnet

           Of  course  a  real  hostname  and  its  particular  top-level  CTAN
           directory  have  to  be  specified.   The  list  of  CTAN mirrors is
           available at <https://ctan.org/mirrors/mirmon>.

           Here's an example of using a local directory:

             -repository /local/TL/repository

           For  backward  compatibility  and  convenience,   "--location"   and
           "--repo" are accepted as aliases for this option.

           Locations can be specified as any of the following:

           "/some/local/dir"
           "file:/some/local/dir"
               Equivalent ways of specifying a local directory.

           "ctan"
           "https://mirror.ctan.org/systems/texlive/tlnet"
               Pick  a  CTAN  mirror automatically, trying for one that is both
               nearby and up-to-date. The chosen mirror is used for the  entire
               download.  The  bare "ctan" is merely an alias for the full url.
               (See <https://ctan.org> for more about CTAN and its mirrors.)

           "http://server/path/to/tlnet"
               Standard HTTP. If the (default) LWP method is  used,  persistent
               connections  are  supported. TL can also use "curl" or "wget" to
               do the downloads, or an  arbitrary  user-specified  program,  as
               described        in        the       "tlmgr"       documentation
               (<https://tug.org/texlive/doc/tlmgr.html#ENVIRONMENT-VARIABLES>).

           "https://server/path/to/tlnet"
               Again, if the  (default)  LWP  method  is  used,  this  supports
               persistent  connections.  Unfortunately, some versions of "wget"
               and "curl" do not support https, and even when  "wget"  supports
               https, certificates may be rejected even when the certificate is
               fine,  due  to  a  lack of local certificate roots. The simplest
               workaround for this problem is to use http or ftp.

           "ftp://server/path/to/tlnet"
               If the (default) LWP method is used, persistent connections  are
               supported.

           "user@machine:/path/to/tlnet"
           "scp://user@machine/path/to/tlnet"
           "ssh://user@machine/path/to/tlnet"
               These  forms  are  equivalent;  they  all  use "scp" to transfer
               files.    Using    "ssh-agent"    is     recommended.     (Info:
               <https://en.wikipedia.org/wiki/OpenSSH>,
               <https://en.wikipedia.org/wiki/Ssh-agent>.)

           If  the repository is on the network, trailing "/" characters and/or
           trailing "/tlpkg" and/or "/archive" components are ignored.

       --gui [action]
           Two notable GUI front-ends for "tlmgr", "tlshell"  and  "tlcockpit",
           are started up as separate programs; see their own documentation.

           "tlmgr" itself has a graphical interface as well as the command line
           interface.  You  can give the option to invoke it, "--gui", together
           with an action to be brought directly into the respective screen  of
           the GUI.  For example, running

             tlmgr --gui update

           starts  you  directly  at the update screen.  If no action is given,
           the GUI will be started at the main screen.  See "GUI FOR TLMGR".

           However, the  native  GUI  requires  Perl/TK,  which  is  no  longer
           included  in  TeX Live's Perl distribution for Windows. You may find
           "tlshell" or "tlcockpit" easier to work with.

       --gui-lang llcode
           By  default,  the  GUI  tries  to  deduce  your  language  from  the
           environment   (on   Windows   via   the   registry,   on   Unix  via
           "LC_MESSAGES"). If that fails you can select a different language by
           giving this option with  a  language  code  (based  on  ISO  639-1).
           Currently supported (but not necessarily completely translated) are:
           English (en, default),    Czech (cs),    German (de),   French (fr),
           Italian (it),      Japanese (ja),      Dutch (nl),      Polish (pl),
           Brazilian Portuguese (pt_BR),       Russian (ru),       Slovak (sk),
           Slovenian (sl),   Serbian (sr),   Ukrainian (uk),   Vietnamese (vi),
           simplified Chinese (zh_CN), and traditional Chinese (zh_TW).

           tlshell shares its message catalog with tlmgr.

       --command-logfile file
           "tlmgr"  logs  the  output of all programs invoked (mktexlr, mtxrun,
           fmtutil,   updmap)   to   a   separate   log   file,   by    default
           "TEXMFSYSVAR/web2c/tlmgr-commands.log".   This  option allows you to
           specify a different file for the log.

       --debug-translation
           In GUI mode, this switch tells "tlmgr" to  report  any  untranslated
           (or  missing) messages to standard error.  This can help translators
           to see what remains to be done.

       --machine-readable
           Instead of the normal output intended for human  consumption,  write
           (to  standard  output)  a  fixed  format  more  suitable for machine
           parsing.  See the "MACHINE-READABLE OUTPUT" section below.

       --no-execute-actions
           Suppress the execution of the execute  actions  as  defined  in  the
           tlpsrc files. Unless you are going to do the postprocessing yourself
           (as,  for  example, "install-tl" does), this shouldn't be specified.
           Otherwise, format files and the filename database will become stale,
           among other problems.

       --package-logfile file
           "tlmgr" logs all package actions (install,  remove,  update,  failed
           updates,  failed  restores)  to  a  separate  log  file,  by default
           "TEXMFSYSVAR/web2c/tlmgr.log".  This option allows you to specify  a
           different file for the log.

       --pause
           This  option  makes  "tlmgr"  wait  for  user  input before exiting.
           Useful on Windows to avoid disappearing command windows.

       --persistent-downloads
       --no-persistent-downloads
           For network-based installations, this option (on by  default)  makes
           "tlmgr"  try to set up a persistent connection (using the "LWP" Perl
           module).  The idea is to open and  reuse  only  one  connection  per
           session  between your computer and the server, instead of initiating
           a new download for each package.

           If this is not possible, "tlmgr" will fall back to using "wget".  To
           disable       these        persistent        connections,        use
           "--no-persistent-downloads".

       --pin-file
           Change the pinning file location from "TEXMFLOCAL/tlpkg/pinning.txt"
           (see "Pinning" below).  Documented only for completeness, as this is
           only useful in debugging.

       --usermode
           Activates user mode for this run of "tlmgr"; see "USER MODE" below.

       --usertree dir
           Uses dir for the tree in user mode; see "USER MODE" below.

       --verify-repo=[none|main|all]
           Defines  the  level of verification done: If "none" is specified, no
           verification whatsoever is done. If "main" is given  and  a  working
           GnuPG ("gpg") binary is available, all repositories are checked, but
           only  the  main  repository  is  required  to be signed. If "all" is
           given, then all repositories need to be signed.  See  "CRYPTOGRAPHIC
           VERIFICATION" below for details.

       The   standard   options  for  TeX  Live  programs  are  also  accepted:
       "--help/-h/-?", "--version",  "-q"  (no  informational  messages),  "-v"
       (debugging messages, can be repeated).  For the details about these, see
       the "TeXLive::TLUtils" documentation.

       The  "--version"  option  shows  version  information about the TeX Live
       release and about the "tlmgr" script itself.  If  "-v"  is  also  given,
       revision number for the loaded TeX Live Perl modules are shown, too.

ACTIONS
   help
       Display this help information and exit (same as "--help", and on the web
       at  <https://tug.org/texlive/doc/tlmgr.html>).   Sometimes the "perldoc"
       and/or "PAGER" programs  on  the  system  have  problems,  resulting  in
       control  characters  being  literally  output.   This  can't  always  be
       detected, but you can  set  the  "NOPERLDOC"  environment  variable  and
       "perldoc" will not be used.

   version
       Gives version information (same as "--version").

       If  "-v"  has been given the revisions of the used modules are reported,
       too.

   backup
       backup [option...] --all
       backup [option...] pkg...
           If the "--clean" option is not specified, this action makes a backup
           of the given packages, or all packages given "--all". These  backups
           are  saved  to  the value of the "--backupdir" option, if that is an
           existing and writable directory. If "--backupdir" is not given,  the
           "backupdir" option setting in the TLPDB is used, if present. If both
           are missing, no backups are made. (The installer sets "backupdir" to
           ".../tlpkg/backups", under the TL root installation directory, so it
           is   usually   defined;   see  the  "option"  description  for  more
           information.)

           If the "--clean" option is specified, backups are  pruned  (removed)
           instead  of  saved. The optional integer value N may be specified to
           set the number of backups that will be retained  when  cleaning.  If
           "N"  is  not given, the value of the "autobackup" option is used. If
           both are missing, an error is issued. For  more  details  of  backup
           pruning, see the "option" action.

           Options:

           --backupdir directory
               Overrides  the  "backupdir"  option  setting  in the TLPDB.  The
               directory argument is required and  must  specify  an  existing,
               writable directory where backups are to be placed.

           --all
               If  "--clean" is not specified, make a backup of all packages in
               the TeX Live installation; this will take quite a lot  of  space
               and time.  If "--clean" is specified, all packages are pruned.

           --clean[=N]
               Instead  of  making  backups,  prune the backup directory of old
               backups, as explained above. The  optional  integer  argument  N
               overrides  the  "autobackup"  option set in the TLPDB.  You must
               use "--all" or a list of packages together with this option,  as
               desired.

           --dry-run
               Nothing  is  actually backed up or removed; instead, the actions
               to be performed are written to the terminal.

   bug [search-string]
       Searches for search-string (prompted for, if not  given)  as  a  package
       name  and  in package descriptions, as complete words, and in filenames,
       as any substring, and outputs bug-reporting and  other  information  for
       the package selected from the results.

       The  search is equivalent to "tlmgr search --word --file" search-string.
       Thus, search-string is interpreted as a (Perl) regular expression.

   candidates pkg
       Shows  the  available  candidate  repositories  for  package  pkg.   See
       "MULTIPLE REPOSITORIES" below.

   check [option...] [depends|executes|files|runfiles|texmfdbs|all]
       Execute  one  (or  all) check(s) of the consistency of the installation.
       If no problems are found, there will be no output. (To  get  a  view  of
       what is being done, run "tlmgr -v check".)

       depends
           Lists  those  packages  which  occur as dependencies in an installed
           collection, but are themselves not  installed,  and  those  packages
           which are not contained in any collection.

           If  you call "tlmgr check collections" this test will be carried out
           instead since former versions for "tlmgr" called it that way.

       executes
           Check that the files referred to by "execute" directives in the  TeX
           Live Database are present.

       files
           Checks  that  all  files listed in the local TLPDB ("texlive.tlpdb")
           are actually present, and lists those missing.

       runfiles
           List those filenames that are occurring more than one  time  in  the
           runfiles sections, except for known duplicates.

       texmfdbs
           Checks  related  to the "ls-R" files. If you have defined new trees,
           or changed the "TEXMF" or "TEXMFDBS" variables, it can't hurt to run
           this. It checks that:

           - all items in "TEXMFDBS" have the "!!" prefix.
           - all items in "TEXMFBDS" have an "ls-R" file (if they exist at
           all).
           - all items in "TEXMF" with "!!" are listed in "TEXMFDBS".
           - all items in "TEXMF" with an "ls-R" file are listed in "TEXMFDBS".

       Options:

       --use-svn
           Use the output of "svn status" instead of  listing  the  files;  for
           checking the TL development repository. (This is run nightly.)

   conf
       conf [texmf|tlmgr|updmap [--conffile file] [--delete] [key [value]]]
       conf auxtrees [--conffile file] [show|add|remove] [value]
           With  only  "conf",  show  general configuration information for TeX
           Live, including active configuration files, path settings, and more.
           This is like running "texconfig conf", but works  on  all  supported
           platforms.

           With  one of "conf texmf", "conf tlmgr", or "conf updmap", shows all
           key/value pairs (i.e., all settings) as saved  in  "ROOT/texmf.cnf",
           the  user-specific  "tlmgr"  configuration  file (see below), or the
           first found (via "kpsewhich") "updmap.cfg" file, respectively.

           If key is given in addition, shows the value of only that key in the
           respective file.  If option --delete is also given, the value in the
           given configuration file is entirely  removed  (not  just  commented
           out).

           If value is given in addition, key is set to value in the respective
           file.  No error checking is done!

           The  "PATH"  value  shown  by  "conf"  is  as  used by "tlmgr".  The
           directory in which the "tlmgr" executable is found is  automatically
           prepended to the PATH value inherited from the environment.

           Here is a practical example of changing configuration values. If the
           execution  of  (some or all) system commands via "\write18" was left
           enabled during installation, you can disable it afterwards:

             tlmgr conf texmf shell_escape 0

           The subcommand  "auxtrees"  allows  adding  and  removing  arbitrary
           additional  texmf  trees,  completely under user control.  "auxtrees
           show" shows the list of additional trees, "auxtrees add" tree adds a
           tree to the list, and "auxtrees remove" tree removes a tree from the
           list (if present). The trees should not contain an "ls-R"  file  (or
           files  will not be found if the "ls-R" becomes stale). This works by
           manipulating the Kpathsea variable "TEXMFAUXTREES", in (by  default)
           "ROOT/texmf.cnf".  Example:

             tlmgr conf auxtrees add /quick/test/tree
             tlmgr conf auxtrees remove /quick/test/tree

           In  all cases the configuration file can be explicitly specified via
           the option "--conffile" file, e.g., if you don't want to change  the
           system-wide configuration.

           Warning:  The  general facility for changing configuration values is
           here,  but  tinkering  with  settings  in  this  way   is   strongly
           discouraged.   Again,  no error checking on either keys or values is
           done, so any sort of breakage is possible.

   dump-tlpdb [option...] [--json]
       Dump complete local or remote TLPDB  to  standard  output,  as-is.   The
       output  is  analogous  to the "--machine-readable" output; see "MACHINE-
       READABLE OUTPUT" section.

       Options:

       --local
           Dump the local TLPDB.

       --remote
           Dump the remote TLPDB.

       --json
           Instead of dumping the actual content, the  database  is  dumped  as
           JSON.      For     the     format     of     JSON     output     see
           "tlpkg/doc/json-formats.txt", format definition "TLPDB".

       Exactly one of "--local" and "--remote" must be given.

       In either case, the first line of the output  specifies  the  repository
       location, in this format:

         "location-url" "\t" location

       where  "location-url"  is the literal field name, followed by a tab, and
       location is the file or url to the repository.

       Line endings may be either LF or CRLF depending on the current platform.

   generate
       generate [option...] language
       generate [option...] language.dat
       generate [option...] language.def
       generate [option...] language.dat.lua

       The  "generate"  action  overwrites  any  manual  changes  made  in  the
       respective   files:   it  recreates  them  from  scratch  based  on  the
       information of the installed packages, plus local adaptations.  The  TeX
       Live  installer  and  "tlmgr" routinely call "generate" for all of these
       files.

       For managing your own fonts, please read the "updmap --help" information
       and/or <https://tug.org/fonts/fontinstall.html>.

       For  managing  your  own  formats,  please  read  the  "fmtutil  --help"
       information.

       In  more  detail:  "generate"  remakes  any  of  the configuration files
       "language.dat",  "language.def",   and   "language.dat.lua"   from   the
       information present in the local TLPDB, plus locally-maintained files.

       The      locally-maintained      files     are     "language-local.dat",
       "language-local.def",  or  "language-local.dat.lua",  searched  for   in
       "TEXMFLOCAL"  in  the  respective  directories.   If local additions are
       present, the final file is made by starting with the main file, omitting
       any entries that the local file specifies to be  disabled,  and  finally
       appending the local file.

       (Historical   note:   The   formerly  supported  "updmap-local.cfg"  and
       "fmtutil-local.cnf" are no longer read, since "updmap" and "fmtutil" now
       reads and supports multiple configuration files.  Thus, local  additions
       can  and  should  be  put  into an "updmap.cfg" of "fmtutil.cnf" file in
       "TEXMFLOCAL".  The "generate updmap" and "generate fmtutil"  actions  no
       longer exist.)

       Local  files  specify entries to be disabled with a comment line, namely
       one of these:

         %!NAME
         --!NAME

       where "language.dat" and "language.def" use "%", and  "language.dat.lua"
       use  "--".   In  all  cases,  the  name is the respective format name or
       hyphenation pattern identifier.  Examples:

         %!german
         --!usenglishmax

       (Of course,  you're  not  likely  to  actually  want  to  disable  those
       particular items.  They're just examples.)

       After  such  a  disabling line, the local file can include another entry
       for the same item, if a different definition is  desired.   In  general,
       except  for the special disabling lines, the local files follow the same
       syntax as the master files.

       The form "generate language" recreates all three  files  "language.dat",
       "language.def",   and   "language.dat.lua",  while  the  forms  with  an
       extension recreates only that given language file.

       Options:

       --dest output_file
           specifies the output file (defaults to the  respective  location  in
           "TEXMFSYSVAR").   If  "--dest"  is  given to "generate language", it
           serves as a basename onto which ".dat" will be appended for the name
           of the "language.dat" output file, ".def" will be  appended  to  the
           value for the name of the "language.def" output file, and ".dat.lua"
           to  the name of the "language.dat.lua" file.  (This is just to avoid
           overwriting; if you want a specific name for each  output  file,  we
           recommend invoking "tlmgr" twice.)

       --localcfg local_conf_file
           specifies the (optional) local additions (defaults to the respective
           location in "TEXMFLOCAL").

       --rebuild-sys
           tells "tlmgr" to run necessary programs after config files have been
           regenerated.   These   are:   "fmtutil-sys  --all"  after  "generate
           fmtutil", "fmtutil-sys --byhyphen .../language.dat" after  "generate
           language.dat",  and  "fmtutil-sys --byhyphen .../language.def" after
           "generate language.def".

           These subsequent calls cause the newly-generated files  to  actually
           take  effect.   This  is  not  done by default since those calls are
           lengthy processes and one might want to made several related changes
           in succession before invoking these programs.

       The respective locations are as follows:

         tex/generic/config/language.dat (and language-local.dat)
         tex/generic/config/language.def (and language-local.def)
         tex/generic/config/language.dat.lua (and language-local.dat.lua)

   gui
       Start the graphical user interface. See GUI below.

   info
       info [option...] pkg...
       info [option...] collections
       info [option...] schemes
           With no argument,  lists  all  packages  available  at  the  package
           repository, prefixing those already installed with "i".

           With  the  single  word  "collections" or "schemes" as the argument,
           lists the request type instead of all packages.

           With any other arguments, display information about pkg:  the  name,
           category,  short  and  long description, sizes, installation status,
           and TeX Live revision number.  If  pkg  is  not  locally  installed,
           searches in the remote installation source.

           For  normal  packages (not collections or schemes), the sizes of the
           four groups of files (run/src/doc/bin files) are  shown  separately.
           For  collections,  the  cumulative  size  is  shown,  including  all
           directly-dependent packages (but  not  dependent  collections).  For
           schemes,  the cumulative size is also shown, including all directly-
           dependent collections and packages.

           If pkg is not found locally or remotely, the search action  is  used
           and lists matching packages and files.

           It  also  displays  information taken from the TeX Catalogue, namely
           the package version, date, and license.  Consider these,  especially
           the  package  version, as approximations only, due to timing skew of
           the updates of the different pieces.  By  contrast,  the  "revision"
           value comes directly from TL and is reliable.

           The  former  actions  "show" and "list" are merged into this action,
           but are still supported for backward compatibility.

           Options:

           --list
               If the option "--list" is given with  a  package,  the  list  of
               contained  files  is  also  shown, including those for platform-
               specific dependencies.  When given with schemes and collections,
               "--list" outputs their dependencies in a similar way.

           --only-files
               If this option is given, only the files for a given package  are
               listed, no further information. If more than one package name is
               given, each file list is preceded by the package name.

           --only-installed
               If  this  option  is  given, the installation source will not be
               used; only locally installed packages, collections,  or  schemes
               are listed.

           --only-remote
               Only  list  packages  from  the  remote  repository. Useful when
               checking what is available in a remote repository  using  "tlmgr
               --repo ... --only-remote info". Note that "--only-installed" and
               "--only-remote" cannot both be specified.

           --data "item1,item2,..."
               If the option "--data" is given, its argument must be a comma or
               colon  separated  list  of field names from: "name", "category",
               "localrev", "remoterev", "shortdesc",  "longdesc",  "installed",
               "size",  "relocatable",  "depends",  "cat-version",  "cat-date",
               "cat-license", plus various "cat-contact-*" fields (see below).

               The  "cat-*"  fields   all   come   from   the   TeX   Catalogue
               (<https://ctan.org/pkg/catalogue>). For each, there are two more
               variants  with  prefix  "l"  and  "r",  e.g., "lcat-version" and
               "rcat-version", which indicate the local and remote information,
               respectively. The variants without "l" and  "r"  show  the  most
               current one, which is normally the remote value.

               The requested packages' information is listed in CSV format, one
               package  per  line,  and  the column information is given by the
               "itemN". The "depends" column contains  the  names  of  all  the
               dependencies separated by ":" characters.

               At  this  writing,  the  "cat-contact-*" fields include: "home",
               "repository", "support", "bugs", "announce", "development". Each
               may be empty or a url value. A brief description is on the  CTAN
               upload page for new packages: <https://ctan.org/upload>.

           --json
               If  "--json"  is  specified,  the output is a JSON encoded array
               where each array element is the JSON representation of a  single
               "TLPOBJ"  but  with  additional  information.  For  details  see
               "tlpkg/doc/json-formats.txt", format  definition:  "TLPOBJINFO".
               If   both  "--json"  and  "--data"  are  given,  "--json"  takes
               precedence.

   init-usertree
       Sets up a texmf tree for so-called  user  mode  management,  either  the
       default  user  tree  ("TEXMFHOME"), or one specified on the command line
       with "--usertree".  See "USER MODE" below.

   install [option...] pkg...
       Install each pkg given on  the  command  line,  if  it  is  not  already
       installed.  It does not touch existing packages; see the "update" action
       for how to get the latest version of a package.

       By  default  this also installs all packages on which the given pkgs are
       dependent.  Options:

       --dry-run
           Nothing is actually installed; instead, the actions to be  performed
           are written to the terminal.

       --file
           Instead  of fetching a package from the installation repository, use
           the package files given on the command line.  These  files  must  be
           standard TeX Live package files (with contained tlpobj file).

       --force
           If   updates  to  "tlmgr"  itself  (or  other  parts  of  the  basic
           infrastructure) are present, "tlmgr" will bail out and  not  perform
           the installation unless this option is given.  Not recommended.

       --no-depends
           Do  not  install  dependencies.   (By  default, installing a package
           ensures that all dependencies of this package are fulfilled.)

       --no-depends-at-all
           Normally, when you install a package which ships  binary  files  the
           respective  binary  package  will also be installed.  That is, for a
           package "foo", the package "foo.i386-linux" will also  be  installed
           on  an  "i386-linux"  system.  This option suppresses this behavior,
           and also implies "--no-depends".  Don't use it unless you  are  sure
           of what you are doing.

       --reinstall
           Reinstall a package (including dependencies for collections) even if
           it  already  seems  to  be installed (i.e, is present in the TLPDB).
           This is useful to recover from accidental removal of  files  in  the
           hierarchy.

           When   re-installing,  only  dependencies  on  normal  packages  are
           followed (i.e., not those of category Scheme or Collection).

       --with-doc
       --with-src
           While not recommended, the "install-tl" program provides  an  option
           to  omit installation of all documentation and/or source files.  (By
           default, everything is installed.)  After such an installation,  you
           may find that you want the documentation or source files for a given
           package  after  all.   You  can  get  them by using these options in
           conjunction with "--reinstall", as in (using the "fontspec"  package
           as the example):

             tlmgr install --reinstall --with-doc --with-src fontspec

       This   action   does  not  automatically  add  new  symlinks  in  system
       directories; you need to run "tlmgr path add" ("path") yourself  if  you
       are using this feature and want new symlinks added.

   key
       key list
       key add file
       key remove keyid
           The  action "key" allows listing, adding and removing additional GPG
           keys to the set of trusted keys, that is, those  that  are  used  to
           verify the TeX Live databases.

           With the "list" argument, "key" lists all keys.

           The  "add"  argument requires another argument, either a filename or
           "-" for stdin, from which the key is added. The key is added to  the
           local  keyring  "GNUPGHOME/repository-keys.gpg",  which  is normally
           "tlpkg/gpg/repository-keys.gpg".

           The "remove" argument requires a key id and removes the requested id
           from the local keyring.

   list
       Synonym for "info".

   option
       option [--json] [show]
       option [--json] showall|help
       option key [value]

       The first form, "show", shows the global  TeX  Live  settings  currently
       saved  in  the  TLPDB  with  a  short description and the "key" used for
       changing it in parentheses.

       The second form, "showall", is similar, but also shows options which can
       be defined but are not currently set to any value ("help" is a synonym).

       Both "show..." forms take an option "--json",  which  dumps  the  option
       information  in  JSON  format.   In  this case, both forms dump the same
       data.    For    the    format     of     the     JSON     output     see
       "tlpkg/doc/json-formats.txt", format definition "TLOPTION".

       In  the third form, with key, if value is not given, the setting for key
       is displayed.  If value is present, key is set to value.

       Possible values  for  key  are  (run  "tlmgr  option  showall"  for  the
       definitive list):

        repository (default package repository),
        formats    (generate formats at installation or update time),
        postcode   (run postinst code blobs)
        docfiles   (install documentation files),
        srcfiles   (install source files),
        backupdir  (default directory for backups),
        autobackup (number of backups to keep).
        sys_bin    (directory to which executables are linked by the path action)
        sys_man    (directory to which man pages are linked by the path action)
        sys_info   (directory to which Info files are linked by the path action)
        desktop_integration (Windows-only: create Start menu shortcuts)
        fileassocs (Windows-only: change file associations)
        multiuser  (Windows-only: install for all users)

       One  common use of "option" is to permanently change the installation to
       get further updates from the Internet, after originally installing  from
       DVD.  To do this, you can run

        tlmgr option repository https://mirror.ctan.org/systems/texlive/tlnet

       The  "install-tl"  documentation has more information about the possible
       values for "repository".  (For backward compatibility, "location" can be
       used as a synonym for "repository".)

       If "formats" is set (this is the default), then formats are  regenerated
       when  either  the engine or the format files have changed.  Disable this
       only when you know how and want to regenerate formats yourself  whenever
       needed (which is often, in practice).

       The "postcode" option controls execution of per-package postinstallation
       action code.  It is set by default, and again disabling is not likely to
       be of interest except to developers doing debugging.

       The  "docfiles" and "srcfiles" options control the installation of their
       respective file groups (documentation, sources; grouping is approximate)
       per package. By default both are enabled (1).  Either  or  both  can  be
       disabled  (set  to  0)  if  disk space is limited or for minimal testing
       installations,  etc.   When  disabled,  the  respective  files  are  not
       downloaded at all.

       The  options "autobackup" and "backupdir" determine the defaults for the
       actions "update", "backup" and "restore". These  three  actions  need  a
       directory in which to read or write the backups. If "--backupdir" is not
       specified  on the command line, the "backupdir" option value is used (if
       set). The TL installer sets "backupdir"  to  ".../tlpkg/backups",  under
       the TL root installation directory.

       The  "autobackup"  option (de)activates automatic generation of backups.
       Its value is an integer.  If the "autobackup" value is  -1,  no  backups
       are  removed.   If "autobackup" is 0 or more, it specifies the number of
       backups to keep.  Thus, backups are disabled if the value is 0.  In  the
       "--clean"  mode  of  the  "backup" action this option also specifies the
       number to be kept.  The default value is 1, so that  backups  are  made,
       but only one backup is kept.

       To setup "autobackup" to -1 on the command line, use:

         tlmgr option -- autobackup -1

       The  "--"  avoids  having  the -1 treated as an option.  (The "--" stops
       parsing for options at the point where it appears;  this  is  a  general
       feature across most Unix programs.)

       The  "sys_bin",  "sys_man",  and  "sys_info"  options  are  used on Unix
       systems to control the generation of links for executables,  Info  files
       and man pages. See the "path" action for details.

       The  last  three  options  affect behavior on Windows installations.  If
       "desktop_integration" is set, then some packages will install items in a
       sub-folder of the Start menu for "tlmgr gui",  documentation,  etc.   If
       "fileassocs"  is  set,  Windows file associations are made (see also the
       "postaction" action).  Finally, if "multiuser" is set, then  changes  to
       the  registry and the menus are done for all users on the system instead
       of only the current user.  All three options are on by default.

   paper
       paper [a4|letter]
       <[xdvi|pdftex|dvips|dvipdfmx|context|psutils] paper [papersize|--list]>
       paper --json

       With no arguments ("tlmgr paper"), shows the default paper size  setting
       for all known programs.

       With  one  argument  (e.g.,  "tlmgr paper a4"), sets the default for all
       known programs to that paper size.

       With a program given as the first argument and no paper  size  specified
       (e.g.,  "tlmgr  dvips  paper"),  shows  the  default paper size for that
       program.

       With a program given as the first argument and a paper size as the  last
       argument  (e.g.,  "tlmgr  dvips  paper  a4"),  set  the default for that
       program to that paper size.

       If either "pdftex"  or  "context"  is  one  of  the  arguments,  whether
       implicitly  or  explicitly, existing formats are rebuilt (i.e., "fmtutil
       --refresh" is called), unless "--no-execute-actions" is specified.

       With a program given as the first argument and  "--list"  given  as  the
       last  argument (e.g., "tlmgr dvips paper --list"), shows all valid paper
       sizes for that program.  The first size shown is the default.

       If "--json" is specified without  other  options,  the  paper  setup  is
       dumped   in   JSON   format.   For   the   format  of  JSON  output  see
       "tlpkg/doc/json-formats.txt", format definition "TLPAPER".

       Incidentally, this syntax of having a specific program name  before  the
       "paper"  keyword  is  unusual.   It  is  inherited from the longstanding
       "texconfig" script, which supports other configuration settings for some
       programs,  notably  "dvips".   "tlmgr"  does  not  support  those  extra
       settings.

   path
       path [--windowsmode=user|admin] add
       path [--windowsmode=user|admin] remove
           On  Unix,  adds  or removes symlinks for executables, man pages, and
           info pages in the system directories  specified  by  the  respective
           options  (see  the  "option" description above). Does not change any
           initialization files, either system or  personal.  Furthermore,  any
           executables added or removed by future updates are not taken care of
           automatically; this command must be rerun as needed.

           On Windows, the registry part where the binary directory is added or
           removed is determined in the following way:

           If  the user has admin rights, and the option "--windowsmode" is not
           given, the setting w32_multi_user determines the location (i.e.,  if
           it is on then the system path, otherwise the user path is changed).

           If  the  user  has  admin  rights, and the option "--windowsmode" is
           given, this option determines the path to be adjusted.

           If  the  user  does  not  have  admin   rights,   and   the   option
           "--windowsmode" is not given, and the setting w32_multi_user is off,
           the user path is changed, while if the setting w32_multi_user is on,
           a warning is issued that the caller does not have enough privileges.

           If   the   user   does   not  have  admin  rights,  and  the  option
           "--windowsmode" is given, it must be "user" and the user  path  will
           be  adjusted.  If  a  user  without  admin  rights  uses  the option
           "--windowsmode admin" a warning is issued that the caller  does  not
           have enough privileges.

   pinning
       The "pinning" action manages the pinning file, see "Pinning" below.

       "pinning show"
           Shows the current pinning data.

       "pinning add" repo pkgglob...
           Pins the packages matching the pkgglob(s) to the repository repo.

       "pinning remove" repo pkgglob...
           Any  packages  recorded  in the pinning file matching the <pkgglob>s
           for the given repository repo are removed.

       "pinning remove repo --all"
           Remove all pinning data for repository repo.

   platform
       platform list|add|remove platform...
       platform set platform
       platform set auto
           "platform list" lists the  TeX  Live  names  of  all  the  platforms
           (a.k.a. architectures), ("i386-linux", ...) available at the package
           repository.

           "platform  add"  platform...  adds  the  executables  for each given
           platform platform to the installation from the repository.

           "platform remove" platform... removes the executables for each given
           platform platform from the installation,  but  keeps  the  currently
           running platform in any case.

           "platform  set"  platform  switches TeX Live to always use the given
           platform instead of auto detection.

           "platform set auto" switches TeX Live to  auto  detection  mode  for
           platform.

           Platform  detection  is  needed to select the proper "xz" and "wget"
           binaries that are shipped with TeX Live.

           "arch" is a synonym for "platform".

           Options:

           --dry-run
               Nothing is  actually  installed;  instead,  the  actions  to  be
               performed are written to the terminal.

   postaction
       postaction [option...] install [shortcut|fileassoc|script] [pkg...]
       postaction [option...] remove [shortcut|fileassoc|script] [pkg...]
           Carry  out the postaction "shortcut", "fileassoc", or "script" given
           as the second required argument in install or remove mode (which  is
           the  first  required argument), for either the packages given on the
           command line, or for all if "--all" is given.

           Options:

           --windowsmode=[user|admin]
               If the option "--windowsmode" is given  the  value  "user",  all
               actions will only be carried out in the user-accessible parts of
               the  registry/filesystem,  while  the  value "admin" selects the
               system-wide parts of the registry for the file associations.  If
               you do not have enough permissions, using  "--windowsmode=admin"
               will not succeed.

           --fileassocmode=[1|2]
               "--fileassocmode"  specifies  the  action for file associations.
               If it is set to 1  (the  default),  only  new  associations  are
               added;  if  it  is set to 2, all associations are set to the TeX
               Live programs.  (See also "option fileassocs".)

           --all
               Carry out the postactions for all packages

   print-platform
       Print   the   TeX   Live   identifier   for   the   detected    platform
       (hardware/operating  system)  combination  to standard output, and exit.
       "--print-arch" is a synonym.

   print-platform-info
       Print the TeX Live platform  identifier,  TL  platform  long  name,  and
       original output from guess.

   remove [option...] pkg...
       Remove  each  pkg  specified.  Removing a collection removes all package
       dependencies  (unless  "--no-depends"  is  specified),   but   not   any
       collection  dependencies  of  that collection.  However, when removing a
       package, dependencies are never removed.  Options:

       --all
           Uninstalls all of TeX Live, asking for confirmation unless "--force"
           is also specified.

       --backup
       --backupdir directory
           These options behave just as with the update action  (q.v.),  except
           they  apply  to  making backups of packages before they are removed.
           The default is to make such a backup, that is, to  save  a  copy  of
           packages before removal.

           The "restore" action explains how to restore from a backup.

       --no-depends
           Do not remove dependent packages.

       --no-depends-at-all
           See above under install (and beware).

       --force
           By  default, removal of a package or collection that is a dependency
           of another collection or scheme is not allowed.  With  this  option,
           the package will be removed unconditionally.  Use with care.

           A  package  that has been removed using the "--force" option because
           it is still listed in an installed collection or scheme will not  be
           updated,  and  will be mentioned as "forcibly removed" in the output
           of "tlmgr update --list".

       --dry-run
           Nothing is actually removed; instead, the actions  to  be  performed
           are written to the terminal.

       Except  with "--all", this "remove" action does not automatically remove
       symlinks to executables from system directories; you need to run  "tlmgr
       path  remove" ("path") yourself if you remove an individual package with
       a symlink in a system directory.

   repository
       repository list
       repository list path|url|tag
       repository add path [tag]
       repository remove path|tag
       repository set path[#tag] [path[#tag] ...]
       repository status
           This  action  manages  the  list  of  repositories.   See   MULTIPLE
           REPOSITORIES below for detailed explanations.

           The first form, "repository list", lists all configured repositories
           and  the  respective  tags  if  set. If a path, url, or tag is given
           after the "list" keyword, it is interpreted as the source from which
           to initialize a TL database and lists the contained  packages.  This
           can  also be an otherwise-unused repository, either local or remote.
           If the option "--with-platforms" is specified in addition, for  each
           package the available platforms (if any) are also listed.

           The  form "repository add" adds a repository (optionally attaching a
           tag) to the list of repositories, while "repository remove"  removes
           a repository, either by full path/url, or by tag.

           The form "repository set" sets the list of available repositories to
           the items given on the command line, overwriting previous settings.

           The  form "repository status" reports the verification status of the
           loaded repositories with the format of one repository per line  with
           fields separated by a single space:

           The tag (which can be the same as the url);
               = the url;

               =  iff  machine-readable  output  is specified, the verification
               code (a number);

               = a textual description of the verification status, as the  last
               field extending to the end of line.

           That  is,  in  normal (not machine-readable) output, the third field
           (numeric verification status) is not present.

           In all cases, one of the repositories  must  be  tagged  as  "main";
           otherwise, all operations will fail!

   restore
       restore [option...] pkg [rev]
       restore [option...] --all
           Restore a package from a previously-made backup.

           If  "--all"  is  given,  try  to  restore the latest revision of all
           package backups found in the backup directory.

           Otherwise, if neither pkg nor rev  are  given,  list  the  available
           backup  revisions for all packages.  With pkg given but no rev, list
           all available backup revisions of pkg.

           When listing available packages, "tlmgr" shows the revision, and  in
           parenthesis  the  creation  time  if available (in format yyyy-mm-dd
           hh:mm).

           If (and only if) both pkg  and  a  valid  revision  number  rev  are
           specified, try to restore the package from the specified backup.

           Options:

           --all
               Try  to restore the latest revision of all package backups found
               in the backup directory. Additional non-option  arguments  (like
               pkg) are not allowed.

           --backupdir directory
               Specify  the directory where the backups are to be found. If not
               given it will be taken from the  configuration  setting  in  the
               TLPDB.

           --dry-run
               Nothing  is  actually  restored;  instead,  the  actions  to  be
               performed are written to the terminal.

           --force
               Don't ask questions.

           --json
               When listing backups, the option "--json"  writes  JSON  output.
               The  format is an array of JSON objects ("name", "rev", "date").
               For details see "tlpkg/doc/json-formats.txt", format definition:
               "TLBACKUPS". If both "--json" and "--data" are  given,  "--json"
               takes precedence.

   search
       search [option...] what
       search [option...] --file what
       search [option...] --all what
           By   default,   search  the  names,  short  descriptions,  and  long
           descriptions of all locally  installed  packages  for  the  argument
           what, interpreted as a (Perl) regular expression.

           Options:

           --file
               List all filenames containing what.

           --all
               Search everything: package names, descriptions and filenames.

           --global
               Search the TeX Live Database of the installation medium, instead
               of the local installation.

           --word
               Restrict  the  search of package names and descriptions (but not
               filenames) to match only full words.  For example, searching for
               "table" with this option will not output packages containing the
               word "tables" (unless they also contain the word "table" on  its
               own).

           --json
               Output  search  results  as a JSON hash with two keys: files and
               packages.   For   the   format   of   the   JSON   output    see
               "tlpkg/doc/json-formats.txt", format definition "TLSEARCH".

   shell
       Starts  an  interactive mode, where tlmgr prompts for commands. This can
       be used directly,  or  for  scripting.  The  first  line  of  output  is
       "protocol"  n,  where  n  is an unsigned number identifying the protocol
       version (currently 1).

       In general, tlmgr  actions  that  can  be  given  on  the  command  line
       translate  to  commands  in  this  shell mode.  For example, you can say
       "update --list" to see what would be updated. The TLPDB  is  loaded  the
       first time it is needed (not at the beginning), and used for the rest of
       the session.

       Besides these actions, a few commands are specific to shell mode:

       protocol
           Print "protocol n", the current protocol version.

       help
           Print pointers to this documentation.

       version
           Print tlmgr version information.

       quit, end, bye, byebye, EOF
           Exit.

       restart
           Restart  "tlmgr  shell"  with the original command line; most useful
           when developing "tlmgr".

       load [local|remote]
           Explicitly load the local or remote, respectively, TLPDB.

       save
           Save the local TLPDB, presumably after other operations have changed
           it.

       get [var] =item set [var [val]]
           Get the value of var,  or  set  it  to  val.   Possible  var  names:
           "debug-translation",    "machine-readable",    "no-execute-actions",
           "require-verification",   "verify-downloads",   "repository",    and
           "prompt".  All except "repository" and "prompt" are booleans, taking
           values 0 and 1, and  behave  like  the  corresponding  command  line
           option.   The  "repository"  variable  takes  a string, and sets the
           remote repository location. The "prompt" variable  takes  a  string,
           and sets the current default prompt.

           If var or then val is not specified, it is prompted for.

   show
       Synonym for "info".

   uninstall
       Synonym for remove.

   update [option...] [pkg...]
       Updates  the packages given as arguments to the latest version available
       at the installation source.  Either "--all" or at  least  one  pkg  name
       must be specified.  Options:

       --all
           Update  all installed packages except for "tlmgr" itself. If updates
           to "tlmgr" itself are present, this gives an error, unless also  the
           option "--force" or "--self" is given. (See below.)

           In addition to updating the installed packages, during the update of
           a  collection the local installation is (by default) synchronized to
           the status of the collection on the server, for both  additions  and
           removals.

           This  means  that  if  a package has been removed on the server (and
           thus has also been removed from the respective collection),  "tlmgr"
           will  remove  the package in the local installation.  This is called
           ``auto-remove'' and is announced  as  such  when  using  the  option
           "--list".   This  auto-removal  can  be  suppressed using the option
           "--no-auto-remove" (not recommended, see option description).

           Analogously, if a package has been added  to  a  collection  on  the
           server that is also installed locally, it will be added to the local
           installation.   This  is called ``auto-install'' and is announced as
           such when using the option "--list".  This auto-installation can  be
           suppressed   using   the   option   "--no-auto-install"   (also  not
           recommended).

           An exception to the  collection  dependency  checks  (including  the
           auto-installation  of  packages  just mentioned) are those that have
           been ``forcibly removed'' by you, that is, you called "tlmgr  remove
           --force"  on  them.   (See  the  "remove" action documentation.)  To
           reinstall    any    such    forcibly    removed     packages     use
           "--reinstall-forcibly-removed".

           To   reiterate:   automatic  removals  and  additions  are  entirely
           determined by comparison  of  collections.  Thus,  if  you  manually
           install  an individual package "foo" which is later removed from the
           server, "tlmgr" will not notice and will not remove it locally.  (It
           has  to  be this way, without major rearchitecture work, because the
           tlpdb does not record the repository from which packages come from.)

           If you want to exclude some packages from  the  current  update  run
           (e.g., due to a slow link), see the "--exclude" option below.

       --self
           Update  "tlmgr"  itself  (that  is,  the infrastructure packages) if
           updates to it are present. On Windows this includes updates  to  the
           private Perl interpreter shipped inside TeX Live.

           If  this  option  is given together with either "--all" or a list of
           packages, then "tlmgr" will be updated first  and,  if  this  update
           succeeds,  the new version will be restarted to complete the rest of
           the updates.

           In short:

             tlmgr update --self        # update infrastructure only
             tlmgr update --self --all  # update infrastructure and all packages
             tlmgr update --force --all # update all packages but *not* infrastructure
                                        # ... this last at your own risk, not recommended!

       --dry-run
           Nothing is actually installed; instead, the actions to be  performed
           are  written  to  the terminal.  This is a more detailed report than
           "--list".

       --list [pkg]
           Concisely list the packages which would be updated, newly installed,
           or removed, without actually changing anything.  If "--all" is  also
           given,  all available updates are listed.  If "--self" is given, but
           not "--all", only updates to the critical packages  (tlmgr,  texlive
           infrastructure,  perl  on  Windows,  etc.)   are listed.  If neither
           "--all" nor "--self" is given, and in addition no pkg is given, then
           "--all" is assumed (thus, "tlmgr  update  --list"  is  the  same  as
           "tlmgr  update  --list  --all").  If neither "--all" nor "--self" is
           given, but specific package names  are  given,  those  packages  are
           checked for updates.

       --exclude pkg
           Exclude  pkg  from the update process.  If this option is given more
           than once, its arguments accumulate.

           An argument pkg excludes both the package pkg  itself  and  all  its
           related platform-specific packages pkg.ARCH.  For example,

             tlmgr update --all --exclude a2ping

           will   not   update  "a2ping",  "a2ping.i386-linux",  or  any  other
           "a2ping."ARCH package.

           If this option  specifies  a  package  that  would  otherwise  be  a
           candidate  for auto-installation, auto-removal, or reinstallation of
           a forcibly removed package, "tlmgr" quits  with  an  error  message.
           Excludes are not supported in these circumstances.

           This  option  can  also  be set permanently in the tlmgr config file
           with the key "update-exclude".

       --no-auto-remove [pkg...]
           By  default,  "tlmgr"  tries  to  remove  packages  in  an  existing
           collection  which have disappeared on the server, as described above
           under "--all".  This option prevents such removals, either  for  all
           packages  (with  "--all"), or for just the given pkg names. This can
           lead to an inconsistent TeX installation,  since  packages  are  not
           infrequently renamed or replaced by their authors. Therefore this is
           not recommended.

       --no-auto-install [pkg...]
           Under  normal  circumstances "tlmgr" will install packages which are
           new on the server, as described above under  "--all".   This  option
           prevents  any  such  automatic installation, either for all packages
           (with "--all"), or the given pkg names.

           Furthermore, after the "tlmgr" run  using  this  has  finished,  the
           packages  that  would have been auto-installed will be considered as
           forcibly removed.  So, if "foobar" is the only new  package  on  the
           server, then

             tlmgr update --all --no-auto-install

           is equivalent to

             tlmgr update --all
             tlmgr remove --force foobar

           Again,  since packages are sometimes renamed or replaced, using this
           option is not recommended.

       --reinstall-forcibly-removed
           Under normal circumstances "tlmgr" will not  install  packages  that
           have  been  forcibly  removed  by  the  user;  that is, removed with
           "remove  --force",  or  whose   installation   was   prohibited   by
           "--no-auto-install" during an earlier update.

           This  option  makes  "tlmgr"  ignore  the  forcible removals and re-
           install  all  such  packages.  This  can  be  used   to   completely
           synchronize  an  installation  with  the  server's  idea  of what is
           available:

             tlmgr update --reinstall-forcibly-removed --all

       --backup
       --backupdir directory
           These two options control the creation of backups of packages before
           updating; that is, backing up packages as currently  installed.   If
           neither  option  is  given, no backup will made. If "--backupdir" is
           given and specifies a writable directory then a backup will be  made
           in that location. If only "--backup" is given, then a backup will be
           made  to  the  directory previously set via the "option" action (see
           below). If both are  given  then  a  backup  will  be  made  to  the
           specified directory.

           You  can  also  set options via the "option" action to automatically
           make backups for all packages, and/or keep only a certain number  of
           backups.

           "tlmgr"  always  makes a temporary backup when updating packages, in
           case of download or other failure during an  update.   In  contrast,
           the purpose of this "--backup" option is to save a persistent backup
           in  case  the  actual  content  of the update causes problems, e.g.,
           introduces an TeX incompatibility.

           The "restore" action explains how to restore from a backup.

       --no-depends
           If you call for updating a package normally all  depending  packages
           will  also  be  checked  for  updates and updated if necessary. This
           switch suppresses this behavior.

       --no-depends-at-all
           See above under install (and beware).

       --force
           Force update of normal packages,  without  updating  "tlmgr"  itself
           (unless the "--self" option is also given).  Not recommended.

           Also, "update --list" is still performed regardless of this option.

       If the package on the server is older than the package already installed
       (e.g.,  if  the  selected  mirror  is  out  of  date),  "tlmgr" does not
       downgrade.  Also, packages for uninstalled platforms are not installed.

       "tlmgr" saves one copy of the main  "texlive.tlpdb"  file  used  for  an
       update   with   a   suffix   representing  the  repository  url,  as  in
       "tlpkg/texlive.tlpdb.main."long-hash-string.  Thus,   even   when   many
       mirrors  are  used,  only  one main "tlpdb" backup is kept. For non-main
       repositories, which do not generally have (m)any mirrors, no pruning  of
       backups is done.

       This  action does not automatically add or remove new symlinks in system
       directories; you need to run "tlmgr" "path" yourself if  you  are  using
       this feature and want new symlinks added.

CONFIGURATION FILE FOR TLMGR
       "tlmgr"   reads   two   configuration  files:  one  is  system-wide,  in
       "TEXMFSYSCONFIG/tlmgr/config",  and  the  other  is  user-specific,   in
       "TEXMFCONFIG/tlmgr/config".   The  user-specific  one is the default for
       the "conf tlmgr" action.  (Run "kpsewhich -var-value=TEXMFSYSCONFIG"  or
       "... TEXMFCONFIG ..." to see the actual directory names.)

       A few defaults corresponding to command-line options can be set in these
       configuration  files.   In  addition, the system-wide file can contain a
       directive to restrict the allowed actions.

       In these config files,  empty  lines  and  lines  starting  with  #  are
       ignored.  All other lines must look like:

         key = value

       where the spaces are optional but the "=" is required.

       The allowed keys are:

       "auto-remove =" 0 or 1 (default 1), same as command-line option.
       "gui-expertmode =" 0 or 1 (default 1). This switches between the full
       GUI and a simplified GUI with only the most common settings.
       "gui-lang =" llcode, with a language code value as with the command-line
       option.
       "no-checksums =" 0 or 1 (default 0, see below).
       "persistent-downloads =" 0 or 1 (default 1), same as command-line
       option.
       "require-verification =" 0 or 1 (default 0), same as command-line
       option.
       "tkfontscale =" floating-point number (default 1.0); scaling factor for
       fonts in the Tk-based frontends.
       "update-exclude =" comma-separated list of packages (no spaces allowed).
       Same as the command line option "--exclude" for the "update" action.
       "verify-downloads =" 0 or 1 (default 1), same as command-line option.

       The system-wide config file can contain one additional key:

       "allowed-actions =" action1[,action2,...] The value is a comma-separated
       list (no spaces) of "tlmgr" actions which are allowed to be executed
       when "tlmgr" is invoked in system mode (that is, without "--usermode").
       This allows distributors to include "tlmgr" in their packaging, but
       allow only a restricted set of actions that do not interfere with their
       distro package manager. For native TeX Live installations, it doesn't
       make sense to set this.

       Finally,  the  "no-checksums"  key  needs  more explanation. By default,
       package checksums computed and stored on the server (in the  TLPDB)  are
       compared    to    checksums    computed   locally   after   downloading.
       "no-checksums" disables this process. The checksum algorithm is SHA-512.
       Your system must have one  of  (looked  for  in  this  order)  the  Perl
       "Digest::SHA" module, the "openssl" program (<https://openssl.org>), the
       "sha512sum"         program         (from         GNU         Coreutils,
       <https://www.gnu.org/software/coreutils>),  or  finally   the   "shasum"
       program  (just  to  support old Macs). If none of these are available, a
       warning is issued  and  "tlmgr"  proceeds  without  checking  checksums.
       "no-checksums"    avoids   the   warning.   (Incidentally,   other   SHA
       implementations, such as the pure Perl and pure Lua  modules,  are  much
       too slow to be usable in our context.)

CRYPTOGRAPHIC VERIFICATION
       "tlmgr" and "install-tl" perform cryptographic verification if possible.
       If  verification  is  performed  and  successful,  the  programs  report
       "(verified)" after loading  the  TLPDB;  otherwise,  they  report  "(not
       verified)".   But either way, by default the installation and/or updates
       proceed normally.

       If a program named "gpg" is available (that is,  found  in  "PATH"),  by
       default  cryptographic  signatures  will be checked: we require the main
       repository be signed, but not any additional repositories. If  "gpg"  is
       not available, by default signatures are not checked and no verification
       is carried out, but "tlmgr" still proceeds normally.

       The  behavior  of the verification can be controlled by the command line
       and config file option "verify-repo" which takes one  of  the  following
       values:   "none",   "main",  or  "all".  With  "none",  no  verification
       whatsoever is attempted.  With  "main"  (the  default)  verification  is
       required  only  for the main repository, and only if "gpg" is available;
       though attempted for all, missing signatures of subsidiary  repositories
       will  not result in an error.  Finally, in the case of "all", "gpg" must
       be available and all repositories need to be signed.

       In all cases, if a signature is checked and fails to verify, an error is
       raised.

       Cryptographic verification requires checksum  checking  (described  just
       above)  to  succeed,  and a working GnuPG ("gpg") program (see below for
       search  method).   Then,  unless  cryptographic  verification  has  been
       disabled,  a signature file ("texlive.tlpdb.*.asc") of the checksum file
       is downloaded and the signature verified. The signature  is  created  by
       the  TeX  Live Distribution GPG key 0x0D5E5D9106BAB6BC, which in turn is
       signed by Karl Berry's key 0x0716748A30D155AD and Norbert Preining's key
       0x6CACA448860CDC13.  All of these keys are obtainable from the  standard
       key servers.

       Additional trusted keys can be added using the "key" action.

   Configuration of GnuPG invocation
       The executable used for GnuPG is searched as follows: If the environment
       variable  "TL_GNUPG"  is  set, it is tested and used; otherwise "gpg" is
       checked; finally "gpg2" is checked.

       Further adaptation of the "gpg" invocation can be  made  using  the  two
       environment  variables  "TL_GNUPGHOME",  which is passed to "gpg" as the
       value for "--homedir", and "TL_GNUPGARGS", which  replaces  the  default
       options "--no-secmem-warning --no-permission-warning".

USER MODE
       "tlmgr"  provides  a  restricted  way,  called  ``user mode'', to manage
       arbitrary texmf trees in the same way as  the  main  installation.   For
       example,   this   allows   people   without  write  permissions  on  the
       installation location to update/install packages into a  tree  of  their
       own.

       "tlmgr"  is  switched  into  user  mode  with  the  command  line option
       "--usermode".  It does  not  switch  automatically,  nor  is  there  any
       configuration  file  setting  for  it.   Thus,  this  option  has  to be
       explicitly given every time user mode is to be activated.

       This mode of "tlmgr" works on a user tree, by default the value  of  the
       "TEXMFHOME"  variable.   This  can  be  overridden with the command line
       option "--usertree".  In the following when we speak of the user tree we
       mean either "TEXMFHOME" or the one given on the command line.

       Not all actions are allowed in user mode; "tlmgr" will warn you and  not
       carry  out  any  problematic  actions.   Currently  not  supported  (and
       probably will never be) is the "platform" action.  The "gui"  action  is
       currently not supported, but may be in a future release.

       Some  "tlmgr" actions don't need any write permissions and thus work the
       same in user mode  and  normal  mode.   Currently  these  are:  "check",
       "help",   "list",   "print-platform",  "print-platform-info",  "search",
       "show", "version".

       On the other hand, most of the actions dealing with  package  management
       do  need write permissions, and thus behave differently in user mode, as
       described  below:  "install",  "update",  "remove",  "option",  "paper",
       "generate", "backup", "restore", "uninstall", "symlinks".

       Before using "tlmgr" in user mode, you have to set up the user tree with
       the   "init-usertree"   action.    This   creates  usertree"/web2c"  and
       usertree"/tlpkg/tlpobj", and a  minimal  usertree"/tlpkg/texlive.tlpdb".
       At  that  point,  you  can tell "tlmgr" to do the (supported) actions by
       adding the "--usermode" command line option.

       In user mode the file usertree"/tlpkg/texlive.tlpdb" contains  only  the
       packages that have been installed into the user tree using "tlmgr", plus
       additional options from the ``virtual'' package "00texlive.installation"
       (similar to the main installation's "texlive.tlpdb").

       All actions on packages in user mode can only be carried out on packages
       that  are known as "relocatable".  This excludes all packages containing
       executables and a few other core packages.  Of the 2500 or  so  packages
       currently  in  TeX  Live  the  vast  majority are relocatable and can be
       installed into a user tree.

       Description of changes of actions in user mode:

   User mode install
       In user mode, the "install" action  checks  that  the  package  and  all
       dependencies are all either relocated or already installed in the system
       installation.   If  this  is  the  case, it unpacks all containers to be
       installed into the user tree (to repeat, that's  either  "TEXMFHOME"  or
       the  value  of "--usertree") and add the respective packages to the user
       tree's "texlive.tlpdb" (creating it if need be).

       Currently installing a collection in user mode  installs  all  dependent
       packages,  but  in  contrast  to normal mode, does not install dependent
       collections.    For   example,   in   normal   mode    "tlmgr    install
       collection-context"   would   install   "collection-basic"   and   other
       collections,  while  in  user  mode,  only  the  packages  mentioned  in
       "collection-context" are installed.

       If  a  package shipping map files is installed in user mode, a backup of
       the user's "updmap.cfg" in "USERTREE/web2c/" is made, and then this file
       regenerated from the list of installed packages.

   User mode backup, restore, remove, update
       In user mode, these actions check that all packages to be acted  on  are
       installed  in  the  user  tree before proceeding; otherwise, they behave
       just as in normal mode.

   User mode generate, option, paper
       In  user  mode,  these  actions  operate  only  on   the   user   tree's
       configuration files and/or "texlive.tlpdb".

   User mode logs
       In  user  mode,  "tlmgr.log" and <tlmgr-commands.log> are written in the
       "TEXMFVAR/web2c/" directlry instead of "TEXMFSYSVAR/web2c/".

MULTIPLE REPOSITORIES
       The main  TeX  Live  repository  contains  a  vast  array  of  packages.
       Nevertheless,  additional  local  repositories  can be useful to provide
       locally-installed resources, such as proprietary fonts and house styles.
       Also, alternative package repositories distribute packages  that  cannot
       or should not be included in TeX Live, for whatever reason.

       The  simplest  and  most  reliable  method  is  to  temporarily  set the
       installation source to any repository (with the "-repository" or "option
       repository" command line options), and perform your operations.

       When you are using multiple repositories  over  a  sustained  length  of
       time,  however,  explicitly switching between them becomes inconvenient.
       Thus, it's possible to tell "tlmgr" about  additional  repositories  you
       want  to use.  The basic command is "tlmgr repository add".  The rest of
       this section explains further.

       When using multiple repositories, one of them has to be set as the  main
       repository,  which distributes most of the installed packages.  When you
       switch from a single repository installation to  a  multiple  repository
       installation,  the  previous  sole  repository  will  be set as the main
       repository.

       By default, even if multiple repositories are configured,  packages  are
       still  only  installed  from the main repository.  Thus, simply adding a
       second repository does not actually enable installation of anything from
       there.  You also have to specify which packages should be taken from the
       new repository, by specifying  so-called  ``pinning''  rules,  described
       next.

   Pinning
       When  a  package "foo" is pinned to a repository, a package "foo" in any
       other repository, even if it has a higher revision number, will  not  be
       considered an installable candidate.

       As  mentioned  above,  by  default  everything  is  pinned  to  the main
       repository.  Let's now go through an example  of  setting  up  a  second
       repository and enabling updates of a package from it.

       First,  check  that  we have support for multiple repositories, and have
       only one enabled (as is the case by default):

        $ tlmgr repository list
        List of repositories (with tags if set):
          /var/www/norbert/tlnet

       Ok.  Let's add the "tlcontrib" repository (this  is  a  real  repository
       hosted at <http://contrib.texlive.info>) with the tag "tlcontrib":

        $ tlmgr repository add http://contrib.texlive.info/current tlcontrib

       Check the repository list again:

        $ tlmgr repository list
        List of repositories (with tags if set):
           http://contrib.texlive.info/current (tlcontrib)
           /var/www/norbert/tlnet (main)

       Now  we  specify  a  pinning  entry  to  get the package "classico" from
       "tlcontrib":

        $ tlmgr pinning add tlcontrib classico

       Check that we can find "classico":

        $ tlmgr show classico
        package:     classico
        ...
        shortdesc:   URW Classico fonts
        ...

       - install "classico":

        $ tlmgr install classico
        tlmgr: package repositories:
        ...
        [1/1,  ??:??/??:??] install: classico @tlcontrib [737k]

       In the output here you can see that  the  "classico"  package  has  been
       installed from the "tlcontrib" repository (@tlcontrib).

       Finally,  "tlmgr pinning" also supports removing certain or all packages
       from a given repository:

         $ tlmgr pinning remove tlcontrib classico # remove just classico
         $ tlmgr pinning remove tlcontrib --all    # take nothing from tlcontrib

       A summary of "tlmgr pinning" actions is given above.

GUI FOR TLMGR
       The   graphical   user   interface   for   "tlmgr"   requires    Perl/Tk
       <https://search.cpan.org/search?query=perl%2Ftk>. For Unix-based systems
       Perl/Tk  (as  well as Perl of course) has to be installed outside of TL.
       <https://tug.org/texlive/distro.html#perltk> has a list  of  invocations
       for  some  distros.   For  Windows  the  necessary modules are no longer
       shipped within TeX Live,  so  you'll  have  to  have  an  external  Perl
       available that includes them.

       We are talking here about the GUI built into tlmgr itself, not about the
       other  tlmgr  GUIs,  which are: tlshell (Tcl/Tk-based), tlcockpit (Java-
       based) and, only on  Macs,  TeX  Live  Utility.  These  are  invoked  as
       separate programs.

       The  GUI  mode  of  tlmgr  is  started  with the invocation "tlmgr gui";
       assuming Tk is loadable, the graphical user  interface  will  be  shown.
       The main window contains a menu bar, the main display, and a status area
       where messages normally shown on the console are displayed.

       Within  the  main  display  there  are  three  main  parts: the "Display
       configuration" area, the list of packages, and the action buttons.

       Also, at the top right the currently loaded repository  is  shown;  this
       also  acts  as  a  button  and when clicked will try to load the default
       repository.  To load a different repository, see the "tlmgr" menu item.

       Finally, the status area at the bottom of the  window  gives  additional
       information about what is going on.

   Main display
       Display configuration area

       The  first part of the main display allows you to specify (filter) which
       packages are shown.  By  default,  all  are  shown.   Changes  here  are
       reflected right away.

       Status
           Select  whether  to  show  all  packages  (the  default), only those
           installed, only those not  installed,  or  only  those  with  update
           available.

       Category
           Select  which  categories  are  shown: packages, collections, and/or
           schemes.  These are briefly explained in the  "DESCRIPTION"  section
           above.

       Match
           Select  packages  matching for a specific pattern.  By default, this
           searches both descriptions and filenames.  You  can  also  select  a
           subset for searching.

       Selection
           Select  packages  to  those  selected,  those  not selected, or all.
           Here, ``selected'' means that the checkbox in the beginning  of  the
           line of a package is ticked.

       Display configuration buttons
           To  the  right  there are three buttons: select all packages, select
           none (a.k.a. deselect all), and  reset  all  these  filters  to  the
           defaults, i.e., show all available.

       Package list area

       The  second  are of the main display lists all installed packages.  If a
       repository is loaded, those that are available  but  not  installed  are
       also listed.

       Double  clicking  on a package line pops up an informational window with
       further details: the long description, included files, etc.

       Each line of the package list consists of the following items:

       a checkbox
           Used to select particular packages; some of the action buttons  (see
           below) work only on the selected packages.

       package name
           The name (identifier) of the package as given in the database.

       local revision (and version)
           If  the  package  is  installed the TeX Live revision number for the
           installed package will be shown.  If there is  a  catalogue  version
           given  in  the  database  for  this  package,  it  will  be shown in
           parentheses.   However,  the  catalogue  version,  unlike   the   TL
           revision, is not guaranteed to reflect what is actually installed.

       remote revision (and version)
           If  a  repository has been loaded the revision of the package in the
           repository (if present) is shown.  As with the local  column,  if  a
           catalogue  version  is  provided  it will be displayed.  And also as
           with the local column, the catalogue version may be stale.

       short description
           The short description of the package.

       Main display action buttons

       Below the list of packages are several buttons:

       Update all installed
           This calls "tlmgr update --all", i.e., tries to update all available
           packages.  Below this button is a toggle to allow reinstallation  of
           previously removed packages as part of this action.

           The  other  four  buttons  only work on the selected packages, i.e.,
           those where the checkbox at the beginning of  the  package  line  is
           ticked.

       Update
           Update only the selected packages.

       Install
           Install the selected packages; acts like "tlmgr install", i.e., also
           installs  dependencies.   Thus, installing a collection installs all
           its constituent packages.

       Remove
           Removes the selected packages; acts like "tlmgr  remove",  i.e.,  it
           will  also  remove dependencies of collections (but not dependencies
           of normal packages).

       Backup
           Makes a backup of the selected packages; acts like  "tlmgr  backup".
           This  action  needs  the  option  "backupdir"  set  (see "Options -"
           General>).

   Menu bar
       The following entries can be found in the menu bar:

       "tlmgr" menu
           The items here load various repositories: the default  as  specified
           in  the  TeX  Live  database,  the  default  network repository, the
           repository  specified  on  the  command  line  (if  any),   and   an
           arbitrarily  manually-entered one.  Also has the so-necessary "quit"
           operation.

       "Options menu"
           Provides access to several groups of options: "Paper" (configuration
           of default paper sizes), "Platforms" (only on Unix, configuration of
           the supported/installed platforms), "GUI Language" (select  language
           used in the GUI interface), and "General" (everything else).

           Several toggles are also here.  The first is "Expert options", which
           is  set  by  default.  If you turn this off, the next time you start
           the GUI a simplified screen will be shown that display only the most
           important functionality.  This setting is saved in the configuration
           file of "tlmgr"; see "CONFIGURATION FILE FOR TLMGR" for details.

           The other toggles are all off by default: for debugging  output,  to
           disable  the  automatic installation of new packages, and to disable
           the automatic removal of packages deleted from the server.   Playing
           with  the  choices  of  what  is  or  isn't installed may lead to an
           inconsistent TeX Live installation; e.g., when a package is renamed.

       "Actions menu"
           Provides access to several actions:  update  the  filename  database
           (aka   "ls-R",   "mktexlsr",   "texhash"),   rebuild   all   formats
           ("fmtutil-sys --all"), update the font map database  ("updmap-sys"),
           restore  from  a  backup  of a package, and use of symbolic links in
           system directories (not on Windows).

           The final action is to remove the entire TeX Live installation (also
           not on Windows).

       "Help menu"
           Provides access  to  the  TeX  Live  manual  (also  on  the  web  at
           <https://tug.org/texlive/doc.html>) and the usual ``About'' box.

   GUI options
       Some  generic  Perl/Tk  options  can  be  specified  with "tlmgr gui" to
       control the display:

       "-background" color
           Set background color.

       "-font "" fontname fontsize """
           Set font, e.g., "tlmgr gui -font "helvetica 18"".  The  argument  to
           "-font" must be quoted, i.e., passed as a single string.

       "-foreground" color
           Set foreground color.

       "-geometry" geomspec
           Set the X geometry, e.g., "tlmgr gui -geometry 1024x512-0+0" creates
           the  window  of  (approximately)  the  given size in the upper-right
           corner of the display.

       "-xrm" xresource
           Pass the arbitrary X resource string xresource.

       A few other obscure options are recognized but not mentioned here.   See
       the Perl/Tk documentation (<https://search.cpan.org/perldoc?Tk>) for the
       complete list, and any X documentation for general information.

MACHINE-READABLE OUTPUT
       With  the  "--machine-readable"  option, "tlmgr" writes to stdout in the
       fixed line-oriented format described here, and the  usual  informational
       messages  for human consumption are written to stderr (normally they are
       written to stdout).  The  idea  is  that  a  program  can  get  all  the
       information it needs by reading stdout.

       Currently  this option only applies to the update, install, and "option"
       actions.

   Machine-readable "update" and "install" output
       The output format is as follows:

         fieldname "\t" value
         ...
         "end-of-header"
         pkgname status localrev serverrev size runtime esttot
         ...
         "end-of-updates"
         other output from post actions, not in machine readable form

       The  header  section  currently  has  two  fields:  "location-url"  (the
       repository source from which updates are being drawn), and "total-bytes"
       (the total number of bytes to be downloaded).

       The  localrev  and  serverrev  fields  for each package are the revision
       numbers in the local installation and server  repository,  respectively.
       The  size  field is the number of bytes to be downloaded, i.e., the size
       of the compressed tar file for a network installation, not the  unpacked
       size.  The  runtime  and  esttot fields are only present for updated and
       auto-install packages, and contain the currently passed time since start
       of installation/updates and the estimated total time.

       Line endings may be either LF or CRLF depending on the current platform.

       "location-url" location
           The location may be a url (including  "file:///foo/bar/..."),  or  a
           directory  name  ("/foo/bar").   It  is  the package repository from
           which the new package information was drawn.

       "total-bytes" count
           The count is simply a decimal number, the sum of the  sizes  of  all
           the  packages  that  need  updating  or installing (which are listed
           subsequently).

       Then comes a line with only the literal string "end-of-header".

       Each following line until a line with  literal  string  "end-of-updates"
       reports on one package.  The fields on each line are separated by a tab.
       Here are the fields.

       pkgname
           The TeX Live package identifier, with a possible platform suffix for
           executables.   For  instance,  "pdftex"  and "pdftex.i386-linux" are
           given as two separate packages, one on each line.

       status
           The status of the package update.  One character, as follows:

           "d"     The package was removed on the server.

           "f"     The package was removed  in  the  local  installation,  even
                   though  a  collection  depended  on it.  (E.g., the user ran
                   "tlmgr remove --force".)

           "u"     Normal update is needed.

           "r"     Reversed non-update: the locally-installed version is  newer
                   than the version on the server.

           "a"     Automatically-determined  need for installation, the package
                   is new on the server and  is  (most  probably)  part  of  an
                   installed collection.

           "i"     Package  will  be  installed  and isn't present in the local
                   installation (action install).

           "I"     Package is already present but will be  reinstalled  (action
                   install).

       localrev
           The  revision  number  of the installed package, or "-" if it is not
           present locally.

       serverrev
           The revision number of the package on the server, or "-"  if  it  is
           not present on the server.

       size
           The  size in bytes of the package on the server.  The sum of all the
           package sizes is given in the "total-bytes" header  field  mentioned
           above.

       runtime
           The run time since start of installations or updates.

       esttot
           The estimated total time.

   Machine-readable "option" output
       The output format is as follows:

         key "\t" value

       If a value is not saved in the database the string "(not set)" is shown.

       If  you  are  developing  a program that uses this output, and find that
       changes would be helpful, do not hesitate to write the mailing list.

ENVIRONMENT VARIABLES
       "tlmgr" uses many of the standard TeX environment variables, as reported
       by, e.g., "tlmgr conf" ("conf").

       In addition, for ease in scripting and debugging, "tlmgr" looks for  the
       following  environment  variables.  These are not of interest for normal
       user installations.

       "TEXLIVE_COMPRESSOR"
           This variable allows selecting a different  compressor  program  for
           backups and intermediate rollback containers. The order of selection
           is:

           1.      If the environment variable "TEXLIVE_COMPRESSOR" is defined,
                   use  it;  abort  if it doesn't work. Possible values: "lz4",
                   "gzip", "xz". The necessary options are added internally.

           2.      If lz4 is available (either  from  the  system  or  TL)  and
                   working, use that.

           3.      If  gzip  is  available  (from  the system) and working, use
                   that.

           4.      If xz is available  (either  from  the  system  or  TL)  and
                   working, use that.

           lz4  and  gzip  are  faster in creating tlmgr's local backups, hence
           they are preferred. The  unconditional  use  of  xz  for  the  tlnet
           containers is unaffected, to minimize download sizes.

       "TEXLIVE_DOWNLOADER"
       "TL_DOWNLOAD_PROGRAM"
       "TL_DOWNLOAD_ARGS"
           These  options  allow selecting different download programs then the
           ones automatically selected by the installer. The order of selection
           is:

           1.      If the environment variable "TEXLIVE_DOWNLOADER" is defined,
                   use  it;  abort  if  the  specified  program  doesn't  work.
                   Possible   values:  "lwp",  "curl",  "wget".  The  necessary
                   options are added internally.

           2.      If the environment variable "TL_DOWNLOAD_PROGRAM" is defined
                   (can be any value), use it together with "TL_DOWNLOAD_ARGS";
                   abort if it doesn't work.

           3.      If LWP is available and working, use that (by far  the  most
                   efficient method, as it supports persistent downloads).

           4.      If  curl  is  available  (from  the system) and working, use
                   that.

           5.      If wget is available (either from  the  system  or  TL)  and
                   working, use that.

           TL  provides  "wget" binaries for platforms where necessary, so some
           download method should always be available.

       "TEXLIVE_PREFER_OWN"
           By default,  compression  and  download  programs  provided  by  the
           system,  i.e.,  found  along "PATH" are preferred over those shipped
           with TeX Live.

           This can create problems with systems that are too old, and  so  can
           be     overridden    by    setting    the    environment    variable
           "TEXLIVE_PREFER_OWN" to 1. In this case, executables shipped with TL
           will be preferred.

           Extra compression/download programs not  provided  by  TL,  such  as
           gzip, lwp, and curl, are still checked for on the system and used if
           available, per the above. "TEXLIVE_PREFER_OWN" only applies when the
           program  being checked for is shipped with TL, namely the lz4 and xz
           compressors and wget downloader.

           Exception: on Windows, the "tar.exe" shipped with TL is always used,
           regardless of any setting.

AUTHORS AND COPYRIGHT
       This script  and  its  documentation  were  written  for  the  TeX  Live
       distribution (<https://tug.org/texlive>) and both are licensed under the
       GNU General Public License Version 2 or later.

       $Id: tlmgr.pl 73493 2025-01-17 22:28:29Z karl $

perl v5.40.1                       2025-02-23                          TLMGR(1)

Generated by dwww version 1.16 on Tue Dec 16 06:27:26 CET 2025.