CKSUM(1) User Commands CKSUM(1)
NAME
cksum - compute and verify file checksums
SYNOPSIS
cksum [OPTION]... [FILE]...
DESCRIPTION
Print or verify checksums. By default use the 32 bit CRC algorithm.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-a, --algorithm=TYPE
select the digest type to use. See DIGEST below
--base64
emit base64-encoded digests, not hexadecimal
-c, --check
read checksums from the FILEs and check them
-l, --length=BITS
digest length in bits; must not exceed the max for the blake2 al-
gorithm and must be a multiple of 8
--raw emit a raw binary digest, not hexadecimal
--tag create a BSD-style checksum (the default)
--untagged
create a reversed style checksum, without digest type
-z, --zero
end each output line with NUL, not newline, and disable file name
escaping
The following five options are useful only when verifying checksums:
--ignore-missing
don't fail or report status for missing files
--quiet
don't print OK for each successfully verified file
--status
don't output anything, status code shows success
--strict
exit non-zero for improperly formatted checksum lines
-w, --warn
warn about improperly formatted checksum lines
--debug
indicate which implementation used
--help display this help and exit
--version
output version information and exit
DIGEST determines the digest algorithm and default output format:
sysv (equivalent to sum -s)
bsd (equivalent to sum -r)
crc (equivalent to cksum)
crc32b (only available through cksum)
md5 (equivalent to md5sum)
sha1 (equivalent to sha1sum)
sha224 (equivalent to sha224sum)
sha256 (equivalent to sha256sum)
sha384 (equivalent to sha384sum)
sha512 (equivalent to sha512sum)
blake2b
(equivalent to b2sum)
sm3 (only available through cksum)
When checking, the input should be a former output of this program, or
equivalent standalone program.
AUTHOR
Written by Padraig Brady and Q. Frank Xia.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/cksum>
or available locally via: info '(coreutils) cksum invocation'
Packaged by Debian (9.7-3)
Copyright © 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/li-
censes/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
GNU coreutils 9.7 June 2025 CKSUM(1)
Generated by dwww version 1.16 on Tue Dec 16 04:16:46 CET 2025.