User Commands					       SHA1SUM(1)



NAME
     sha1sum - compute and check SHA1 message digest

SYNOPSIS
     sha1sum [OPTION]... [FILE]...

DESCRIPTION
     Print or check SHA1 (160-bit) checksums.  With no	FILE,  or
     when FILE is -, read standard input.

     -b, --binary
	  read in binary mode

     -c, --check
	  read SHA1 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-180-1.   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 sha1sum 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					       SHA1SUM(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	sha1sum	is maintained as  a  Tex-
     info  manual.  If the info	and sha1sum programs are properly
     installed at your site, the command

	  info coreutils sha1sum invocation

     should give you access to the complete manual.







































GNU coreutils 7.4     Last change: May 2009			2