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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.

       Note: 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: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>


COPYRIGHT

       Copyright © 2022 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 9.1                  April 2022                           b2sum(1)

coreutils 9.1 - Generated Fri Aug 12 11:31:15 CDT 2022
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