cksum − compute and verify file checksums
cksum [OPTION]... [FILE]...
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.
−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 algorithm and must be a multiple of 8
−−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) |
|||
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.
Written by Padraig Brady and Q. Frank Xia.
GNU coreutils
online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to
<https://translationproject.org/team/>
Copyright
© 2022 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and
redistribute it. There is NO WARRANTY, to the extent
permitted by law.
Full
documentation
<https://www.gnu.org/software/coreutils/cksum>
or available locally via: info '(coreutils) cksum
invocation'