Provided by: coreutils_8.28-1ubuntu1_amd64 bug


       sha1sum - compute and check SHA1 message digest


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


       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:
              don't fail or report status for missing files

              don't print OK for each successfully verified file

              don't output anything, status code shows success

              exit non-zero for improperly formatted checksum lines

       -w, --warn
              warn about improperly formatted checksum lines

       --help display this help and exit

              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.


       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)


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


       GNU coreutils online help: <>
       Report sha1sum translation bugs to <>


       Copyright © 2017 Free Software Foundation, Inc.  License GPLv3+:  GNU  GPL  version  3  or
       later <>.
       This  is free software: you are free to change and redistribute it.  There is NO WARRANTY,
       to the extent permitted by law.


       Full documentation at: <>
       or available locally via: info '(coreutils) sha1sum invocation'