Manual: gnub2sum

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 for the blake2 algorithm and must be a multiple of 8

       --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
       GNU coreutils online help: 
       Report any translation bugs to 

SEE ALSO
       cksum(1)

       Full documentation 
       or available locally via: info '(coreutils) b2sum invocation'

       Packaged by Ubuntu (9.7-3ubuntu2)
       Copyright © 2025 Free Software Foundation, Inc.
       License GPLv3+: GNU GPL version 3 or later .
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

GNU coreutils 9.7					January 2026						    B2SUM(1)