b2sum(1) — Linux manual page


B2SUM(1)                      User Commands                     B2SUM(1)

NAME         top

       b2sum - compute and check BLAKE2 message digest

SYNOPSIS         top

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

DESCRIPTION         top

       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:
              don't fail or report status for missing files

              don't print OK for each successfully verified file

              don't output anything, status code shows success

              exit non-zero for improperly formatted checksum lines

       -w, --warn
              warn about improperly formatted checksum lines

       --help display this help and exit

              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.

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

AUTHOR         top

       Written by Padraig Brady and Samuel Neves.

REPORTING BUGS         top

       GNU coreutils online help:
       Report any translation bugs to

COPYRIGHT         top

       Copyright © 2023 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         top


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

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project
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       have a bug report for this manual page, see
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GNU coreutils 9.4              August 2023                      B2SUM(1)

Pages that refer to this page: md5sum(1)sha1sum(1)