md5sum
(1)
Name
md5sum - compute and check MD5 message digest
Synopsis
md5sum [OPTION]... [FILE]...
Description
User Commands MD5SUM(1)
NAME
md5sum - compute and check MD5 message digest
SYNOPSIS
md5sum [OPTION]... [FILE]...
DESCRIPTION
Print or check MD5 (128-bit) checksums. With no FILE, or
when FILE is -, read standard input.
-b, --binary
read in binary mode
-c, --check
read MD5 sums from the FILEs and check them
-t, --text
read in text mode (default)
The following three options are useful only when verifying
checksums:
--quiet
don't print OK for each successfully verified file
--status
don't output anything, status code shows success
-w, --warn
warn about improperly formatted checksum lines
--strict
with --check, exit non-zero for any invalid input
--help
display this help and exit
--version
output version information and exit
The sums are computed as described in RFC 1321. When check-
ing, the input should be a former output of this program.
The default mode is to print a line with checksum, a charac-
ter indicating input mode ('*' for binary, space for text),
and name for each FILE.
BUGS
The MD5 algorithm should not be used any more for security
related purposes. Instead, better use an SHA-2 algorithm,
implemented in the programs sha224sum(1), sha256sum(1),
sha384sum(1), sha512sum(1)
GNU coreutils 8.16 Last change: March 2012 1
User Commands MD5SUM(1)
AUTHOR
Written by Ulrich Drepper, Scott Miller, and David Madore.
REPORTING BUGS
Report md5sum bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/core-
utils/>
General help using GNU software: <http://www.gnu.org/geth-
elp/>
Report md5sum translation bugs to <http://translationpro-
ject.org/team/>
COPYRIGHT
Copyright (C) 2012 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 redis-
tribute it. There is NO WARRANTY, to the extent permitted
by law.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------+
|Availability | file/gnu-coreutils |
+---------------+--------------------+
|Stability | Uncommitted |
+---------------+--------------------+
SEE ALSO
The full documentation for md5sum is maintained as a Texinfo
manual. If the info and md5sum programs are properly
installed at your site, the command
info coreutils 'md5sum invocation'
should give you access to the complete manual.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://ftp.gnu.org/gnu/coreutils/coreutils-8.16.tar.xz
Further information about this software can be found on the
open source community website at http://www.gnu.org/soft-
ware/coreutils/.
GNU coreutils 8.16 Last change: March 2012 2