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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
	      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)

       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/>

COPYRIGHT
       Copyright  (C) 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 9.6		 January 2025			      CKSUM(1)

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