Section: User Commands (1)
Updated: March 2016
Return to Main Contents
md5sum - compute and check MD5 message digest
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
create a BSD-style checksum
- -t, --text
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
- -w, --warn
warn about improperly formatted checksum lines
with --check, exit non-zero for any invalid input
display this help and exit
output version information and exit
The sums are computed as described in RFC 1321. 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 input mode ('*' for binary,
space for text), and name for each FILE.
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)
Written by Ulrich Drepper, Scott Miller, and David Madore.
Report md5sum bugs to email@example.com
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report md5sum translation bugs to <http://translationproject.org/team/>
Copyright © 2013 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.
The full documentation for
is maintained as a Texinfo manual. If the
programs are properly installed at your site, the command
info coreutils 'md5sum invocation'
should give you access to the complete manual.
- The following three options are useful only when verifying checksums:
- REPORTING BUGS
- SEE ALSO
This document was created by
using the manual pages.
Time: 08:31:47 GMT, January 21, 2018