checksum Post: 302375373

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LEARN ABOUT OSF1

sha1sum

SHA1SUM(1)							   User Commands							SHA1SUM(1)

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 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

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

COPYRIGHT

       Copyright (C) 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

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

GNU coreutils 8.28						   January 2018 							SHA1SUM(1)