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	three 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

     -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 pro-
     gram.  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 sha256sum bugs to bug-coreutils@gnu.org
     GNU	     coreutils		   home		    page:
     <http://www.gnu.org/software/coreutils/>
     General	    help	using	     GNU	software:
     <http://www.gnu.org/gethelp/>




GNU coreutils 7.4     Last change: May 2009			1






User Commands					     SHA256SUM(1)



COPYRIGHT
     Copyright c 2009 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	redistri-
     bute  it.	 There is NO WARRANTY, to the extent permitted by
     law.

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

	  info coreutils sha256sum invocation

     should give you access to the complete manual.







































GNU coreutils 7.4     Last change: May 2009			2