APT-CONFIG(8) APT APT-CONFIG(8)
NAME
apt-config - APT Configuration Query program
SYNOPSIS
apt-config [--empty] [--format '%f "%v";%n'] [-o=config_string]
[-c=config_file] {shell | dump | {-v | --version} |
{-h | --help}}
DESCRIPTION
apt-config is an internal program used by various portions of the APT
suite to provide consistent configurability. It accesses the main
configuration file /etc/apt/apt.conf in a manner that is easy to use for
scripted applications.
Unless the -h, or --help option is given, one of the commands below must
be present.
shell
shell is used to access the configuration information from a shell
script. It is given pairs of arguments, the first being a shell
variable and the second the configuration value to query. As output
it lists shell assignment commands for each value present. In a
shell script it should be used as follows:
OPTS="-f"
RES=`apt-config shell OPTS MyApp::options`
eval $RES
This will set the shell environment variable $OPTS to the value of
MyApp::options with a default of -f.
The configuration item may be postfixed with a /[fdbi]. f returns
file names, d returns directories, b returns true or false and i
returns an integer. Each of the returns is normalized and verified
internally.
dump
Just show the contents of the configuration space.
OPTIONS
All command line options may be set using the configuration file, the
descriptions indicate the configuration option to set. For boolean
options you can override the config file by using something like
-f-,--no-f, -f=no or several other variations.
--empty
Include options which have an empty value. This is the default, so
use --no-empty to remove them from the output.
--format '%f "%v";%n'
Defines the output of each config option. %t will be replaced with
its individual name, %f with its full hierarchical name and %v with
its value. Use uppercase letters and special characters in the value
will be encoded to ensure that it can e.g. be safely used in a
quoted-string as defined by RFC822. Additionally %n will be replaced
by a newline, and %N by a tab. A % can be printed by using %%.
-h, --help
Show a short usage summary.
-v, --version
Show the program version.
--audit
Show audit (and notice) messages. This overrides the quiet option,
but only for notice messages, not progress ones.
-c, --config-file
Configuration File; Specify a configuration file to use. The program
will read the default configuration file and then this configuration
file. If configuration settings need to be set before the default
configuration files are parsed specify a file with the APT_CONFIG
environment variable. See apt.conf(5) for syntax information.
-o, --option
Set a Configuration Option; This will set an arbitrary configuration
option. The syntax is -o Foo::Bar=bar. -o and --option can be used
multiple times to set different options.
--no-color, --color
Turn colors on or off. Colors are on by default on supported
terminals for apt(8) and can also be disabled using the NO_COLOR or
APT_NO_COLOR environment variables, or further configured by the
APT::Color configuration option and scope, see apt.conf(5) for
information on that.
SEE ALSO
apt.conf(5)
DIAGNOSTICS
apt-config returns zero on normal operation, decimal 100 on error.
BUGS
APT bug page[1]. If you wish to report a bug in APT, please see
/usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.
AUTHORS
Jason Gunthorpe
APT team
NOTES
1. APT bug page
https://bugs.debian.org/src:apt
APT 3.0.3 30 November 2013 APT-CONFIG(8)
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