sha1sum(1) — Linux manual page

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 checksums from the FILEs and check them

       --tag  create a BSD-style checksum

       -t, --text
              read in text mode (default)

       -z, --zero
              end each output line with NUL, not newline, and disable
              file name escaping

   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.

       There is no difference between binary mode and text mode on GNU
       systems.

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:
       <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to
       <https://translationproject.org/team/>

COPYRIGHT         top

       Copyright © 2024 Free Software Foundation, Inc.  License GPLv3+:
       GNU GPL version 3 or later <https://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

       cksum(1)

       Full documentation
       <https://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
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       ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2024-06-14.  If you
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       manual page), send a mail to man-pages@man7.org

GNU coreutils 9.5              March 2024                     SHA1SUM(1)

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