NAME | SYNOPSIS | DESCRIPTION | BUGS | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON

SHA1SUM(1)                      User Commands                     SHA1SUM(1)

NAME         top

       sha1sum - compute and check SHA1 message digest

SYNOPSIS         top

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

DESCRIPTION         top

       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 five options are useful only when verifying checksums:
       --ignore-missing
              don't fail or report status for missing files

       --quiet
              don't print OK for each successfully verified file

       --status
              don't output anything, status code shows success

       --strict
              exit non-zero for improperly formatted checksum lines

       -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 program.  The default mode is
       to print a line with checksum, a space, a character indicating input
       mode ('*' for binary, ' ' for text or where binary is insignificant),
       and name for each FILE.

BUGS         top

       Do not use the SHA-1 algorithm for security related purposes.
       Instead, use an SHA-2 algorithm, implemented in the programs
       sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2
       algorithm, implemented in b2sum(1)

AUTHOR         top

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

REPORTING BUGS         top

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report sha1sum translation bugs to
       <http://translationproject.org/team/>

COPYRIGHT         top

       Copyright © 2017 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         top

       Full documentation at:
       <http://www.gnu.org/software/coreutils/sha1sum>
       or available locally via: info '(coreutils) sha1sum invocation'

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project can
       be found at ⟨http://www.gnu.org/software/coreutils/⟩.  If you have a
       bug report for this manual page, see 
       ⟨http://www.gnu.org/software/coreutils/⟩.  This page was obtained from
       the tarball coreutils-8.28.tar.xz fetched from 
       ⟨http://www.gnutls.org/download.html⟩ on 2017-09-15.  If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org

GNU coreutils 8.28             September 2017                     SHA1SUM(1)

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