sha1sum [OPTION]... [FILE]...
Print or check SHA1 (160-bit) checksums. With no FILE, or when FILE is
-, read standard input.
read in binary mode
read SHA1 sums from the FILEs and check them
read in text mode (default)
The following three options are useful only when verifying checksums:
don't print OK for each successfully verified file
don't output anything, status code shows success
warn about improperly formatted checksum lines
with --check, exit non-zero for any invalid input
--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 character indicating type (`*' for
binary, ` ' for text), and name for each FILE.
Written by Ulrich Drepper, Scott Miller, and David Madore.
Report sha1sum bugs to firstname.lastname@example.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report sha1sum translation bugs to <http://translationpro-
Copyright (C) 2011 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.
GNU coreutils 8.12.197-032bb September 2011 SHA1SUM(1)
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