sha256sum(1)

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  2016 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'

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Free and Open Source Software