linux man page for b2sum

B2SUM(1)							   User Commands							  B2SUM(1)

NAME
       b2sum - compute and check BLAKE2 message digest

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

DESCRIPTION
       Print or check BLAKE2 (512-bit) checksums.

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

       -b, --binary
	      read in binary mode

       -c, --check
	      read BLAKE2 sums from the FILEs and check them

       -l, --length
	      digest length in bits; must not exceed the maximum for the blake2 algorithm and must be a multiple of 8

       --tag  create a BSD-style checksum

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

   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.

AUTHOR
       Written by Padraig Brady and Samuel Neves.

REPORTING BUGS
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report b2sum translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://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 at: <http://www.gnu.org/software/coreutils/b2sum>
       or available locally via: info '(coreutils) b2sum invocation'

GNU coreutils 8.28						   January 2018 							  B2SUM(1)