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shasum

NAME

shasum - compute and check SHA1 message digest

SYNOPSIS

sha1sum [OPTION] [FILE]...
sha1sum [OPTION] --check [FILE]

DESCRIPTION

Print or check SHA1 (160-bit) checksums. With no FILE, or when FILE is -, read standard input.

-b, --binary

read files in binary mode (default on DOS/Windows)

-c, --check

check SHA1 sums against given list

-t, --text

read files 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 formated 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 and Scott Miller.

REPORTING BUGS

Report bugs to <bug-textutils@gnu.org>.

COPYRIGHT

Copyright © 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

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

info shasum

should give you access to the complete manual.