sha256sum

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

       -t, --text
              read in text mode (default)

   The following two options are useful only when verifying checksums:
       --status
              don't output anything, status code shows success

       -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  type  (`*'  for
       binary, ` ' for text), and name for each FILE.

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

REPORTING BUGS
       Report bugs to <bug-coreutils AT gnu.org>.

COPYRIGHT
       Copyright (C) 2006 Free Software Foundation, Inc.
       This  is  free  software.   You may redistribute copies of it under the
       terms      of      the      GNU      General       Public       License
       <http://www.gnu.org/licenses/gpl.html>;.   There  is NO WARRANTY, 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 sha256sum

       should give you access to the complete manual.



sha256sum 5.97                   January 2007                     SHA256SUM(1)