sha256sum(1) - compute and check SHA256 message digest

amurleopard

SHA256SUM(1)                            User Commands                           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)

              Note: There is no difference between binary and text mode option on  GNU  sys‐
              tem.

   The following four options are useful only when verifying checksums:
       --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 character indicating input mode ('*' for binary, space for text), and name for each
       FILE.

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report  sha256sum
       translation bugs to <http://translationproject.org/team/>

AUTHOR
       Written by Ulrich Drepper, Scott Miller, and David Madore.

COPYRIGHT
       Copyright © 2013 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  WAR‐
       RANTY, to the extent permitted by law.

SEE ALSO
       The  full documentation for sha256sum is maintained as a Texinfo manual.  If the info
       and sha256sum programs are properly installed at your site, the command

              info coreutils 'sha256sum invocation'

       should give you access to the complete manual.



GNU coreutils 8.22                      February 2016                           SHA256SUM(1)