Provided by: coreutils_8.28-1ubuntu1_amd64 bug

NAME
       sha256sum - compute and check SHA256 message digest


SYNOPSIS
       sha256sum [OPTION]... [FILE]...


DESCRIPTION
       Print or check SHA256 (256-bit) checksums.

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

       -b, --binary
              read in binary mode

       -c, --check
              read SHA256 sums from the FILEs and check them

       --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 FIPS-180-2.  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 Ulrich Drepper, Scott Miller, and David Madore.


REPORTING BUGS
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report sha256sum 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/sha256sum>
       or available locally via: info '(coreutils) sha2 utilities'