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

       --tag  create a BSD-style checksum

       -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

       --strict
              with --check, exit non-zero for any invalid input

       --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 input mode ('*' for binary, space 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/>
       Report sha1sum translation bugs to <http://translationproject.org/team/>

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 WARRANTY,
       to the extent permitted by law.

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 coreutils 'sha1sum invocation'

       should give you access to the complete manual.