SHA1SUM(1)               User Commands               SHA1SUM(1)





NAME
       sha1sum - compute and check SHA1 message digest

SYNOPSIS
       sha1sum [OPTION] [FILE]...
       sha1sum [OPTION] --check [FILE]

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

       -b, --binary
              read files in binary mode  (default  on  DOS/Win-
              dows)

       -c, --check
              check SHA1 sums against given list

       -t, --text
              read files 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 formated 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
       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 and Scott Miller.

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

COPYRIGHT
       Copyright (C) 2004 Free Software Foundation, Inc.
       This is free software; see the source for copying condi-
       tions.  There is NO warranty; not even for MERCHANTABIL-
       ITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO
       The full documentation for sha1sum is  maintained  as  a
       Texinfo  manual.   If  the info and sha1sum programs are
       properly installed at your site, the command

              info sha1sum

       should give you access to the complete manual.



sha1sum 5.3.0            November 2004               SHA1SUM(1)