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NAME | SYNOPSIS | DESCRIPTION | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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CKSUM(1) User Commands CKSUM(1)
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.
--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
--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)
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 © 2024 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'
This page is part of the coreutils (basic file, shell and text
manipulation utilities) project. Information about the project
can be found at ⟨http://www.gnu.org/software/coreutils/⟩. If you
have a bug report for this manual page, see
⟨http://www.gnu.org/software/coreutils/⟩. This page was obtained
from the tarball coreutils-9.5.tar.xz fetched from
⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2024-06-14. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to [email protected]
GNU coreutils 9.5 March 2024 CKSUM(1)
Pages that refer to this page: b2sum(1), md5sum(1), sha1sum(1), sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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