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:
--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.
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: <http://www.gnu.org/software/coreutils/>
Report sha1sum translation bugs to
<http://translationproject.org/team/>
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.
Full
documentation at:
<http://www.gnu.org/software/coreutils/sha1sum>
or available locally via: info '(coreutils) sha1sum
invocation'