B2SUM(1)			 User Commands			      B2SUM(1)

NAME
       b2sum - compute and check BLAKE2 message digest

SYNOPSIS
       b2sum [OPTION]... [FILE]...

DESCRIPTION
       Print or check BLAKE2b (512-bit) checksums.

       With no FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options
       too.

       -b, --binary
	      read in binary mode

       -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

       --tag  create a BSD-style checksum

       -t, --text
	      read in text mode (default)

       -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

       --help display this help and exit

       --version
	      output version information and exit

       The sums are computed as described in RFC 7693.	When checking, the
       input should be a former output of this program.	 The default mode is
       to print a line with: checksum, a space, a character indicating input
       mode ('*' for binary, ' ' for text or where binary is insignificant),
       and name for each FILE.

       There is no difference between binary mode and text mode on GNU
       systems.

AUTHOR
       Written by Padraig Brady and Samuel Neves.

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
       cksum(1)

       Full documentation <https://www.gnu.org/software/coreutils/b2sum>
       or available locally via: info '(coreutils) b2sum invocation'

GNU coreutils 9.8		September 2025			      B2SUM(1)