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  ©  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'