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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 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 (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 9.9		  November 2025 			CKSUM(1)

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