sha1sum
compute and check SHA1 message digest
- Provided by: coreutils (Version: 8.25-2ubuntu3~16.04)
- Report a bug
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.
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 © 2016 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'