MD5SUM(1) - man page online | user commands

Compute and check MD5 message digest.

February 2017
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 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 five options are useful only when verifying checksums: --ignore-missing don't fail or report status for missing files --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 for‐ mer 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 insignif‐ icant), 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.


GNU coreutils online help: <> Report md5sum translation bugs to <>
Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


Full documentation at: <> or available locally via: info '(coreutils) md5sum invocation'
GNU coreutils 8.25 February 2017 MD5SUM(1)
This manual Reference Other manuals
md5sum(1) referred by backup2l(8) | cfv(1) | changestool(1) | cksfv(1) | debsign(1) | debsums(1) | Digest::MD5(3perl) | dpkg-sig(1) | fai.conf(5) | fdupes(1) | findimagedupes(1p) | jigdo-file(1) | mcookie(1) | monit(1) | nettle-hash(1) | openvpn(8) | perl5140delta(1) | prelink(8) | rdfind(1) | rhash(1)
refer to sha224sum(1) | sha256sum(1) | sha384sum(1) | sha512sum(1)