MD5SUM(1) User Commands MD5SUM(1)
md5sum - compute and check MD5 message digest
md5sum [OPTION]... [FILE]...
Print or check MD5 (128-bit) checksums. With no FILE, or when FILE is -, read standard
read in binary mode
read MD5 sums from the FILEs and check them
--tag create a BSD-style checksum
read in text mode (default)
Note: There is no difference between binary and text mode option on GNU system.
The following four options are useful only when verifying checksums:
don't print OK for each successfully verified file
don't output anything, status code shows success
exit non-zero for improperly formatted checksum lines
warn about improperly formatted checksum lines
--help 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 for-
mer 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.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report md5sum transla-
tion bugs to <http://translationproject.org/team/>
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),
Written by Ulrich Drepper, Scott Miller, and David Madore.
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or
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 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.
GNU coreutils 8.22 June 2014 MD5SUM(1)