## 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

--tag create a BSD-style checksum

-t, --text read in text mode (default)

## The following four 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

--strict exit non-zero for improperly formatted checksum lines

-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 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.

## 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)

## AUTHOR

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

## REPORTING BUGS

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report md5sum translation bugs to <http://translationproject.org/team/>

## COPYRIGHT

Copyright © 2014 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.

## SEE ALSO

Full documentation at: <http://www.gnu.org/software/coreutils/md5sum>
or available locally via: info (aq(coreutils) md5sum invocation(aq