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 size and must be
	      a multiple of 8 for blake2b; must be 224, 256, 384, or 512 for
	      sha2 or sha3

       --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)

       sha2   (equivalent to sha{224,256,384,512}sum)

       sha3   (only available through cksum)

       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
       Report bugs to: bug-coreutils@gnu.org
       GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
       General help using GNU software: <https://www.gnu.org/gethelp/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright © 2025 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'

GNU coreutils 9.8		September 2025			      CKSUM(1)