Linux manual pages Section 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

−t, −−text

read in text mode (default)

The following two options are useful only when verifying checksums:

−−status

don't output anything, status code shows success

−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 character indicating type (`*' for binary, ` ' for text), and name for each FILE.

AUTHOR

Written by Ulrich Drepper, Scott Miller, and David Madore.

REPORTING BUGS

Report bugs to <bug−[email protected]>.

SEE ALSO

The full documentation for sha1sum is maintained as a Texinfo manual. If the info and sha1sum programs are properly installed at your site, the command

info coreutils 'sha1sum invocation'

should give you access to the complete manual.

COPYRIGHT

Copyright © 2008 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.