SHA1SUM
Section: User Commands (1)
Updated: September 2017
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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 © 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 aq(coreutils) sha1sum invocationaq
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- The following five options are useful only when verifying checksums:
-
- BUGS
-
- AUTHOR
-
- REPORTING BUGS
-
- COPYRIGHT
-
- SEE ALSO
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