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 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.

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

BUGS

       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

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

REPORTING BUGS

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

COPYRIGHT

       Copyright  ©  2023  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

       cksum(1)

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