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 algorithm and must be a multiple of 8
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--raw |
emit a raw binary digest, not hexadecimal |
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--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) |
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bsd |
(equivalent to sum -r) |
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crc |
(equivalent to cksum) |
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md5 |
(equivalent to md5sum) |
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sha1 |
(equivalent to sha1sum) |
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sha224 |
(equivalent to sha224sum) |
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sha256 |
(equivalent to sha256sum) |
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|
sha384 |
(equivalent to sha384sum) |
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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/>;
COPYRIGHT
Copyright
© 2023 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.
SEE ALSO
Full
documentation
<https://www.gnu.org/software/coreutils/cksum>;
or available locally via: info '(coreutils) cksum
invocation'