md5sum man page

md5sum — compute and check MD5 message digest


md5sum {{filename1}}

md5sum {{filename1}} {{filename2}}

md5sum -c {{filename.md5}}


md5sum [OPTION]... [FILE]...


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 five options are useful only when verifying checksums

don't fail or report status for missing files
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
-w, --warn
warn about improperly formatted checksum lines
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 space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), 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.

Reporting Bugs

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

See Also

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

Referenced By

cfv(1), changestool(1), cksfv(1), debsign(1), fdupes(1), jigdo-file(1), mcookie(1), monit(1), openvas-nvt-sync(8), openvpn(8), perl5140delta(1), pmldigital(1), xorriso(1), xorrisofs(1).

Explore man page connections for md5sum(1).

GNU coreutils 8.25 October 2016