MD5SUM(1) - Linux man page online | User commands

Compute and check MD5 message digest.

January 2018
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.


Do not use the MD5 algorithm for security related purposes. Instead, use an SHA-2 algo‐ rithm, implemented in the programs sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2 algorithm, implemented in b2sum(1)


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


GNU coreutils online help: <> Report md5sum translation bugs to <>
Copyright © 2017 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 8.28 January 2018 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) | fdupes(1) | findimagedupes(1p) | jigdo-file(1) | mcookie(1) | monit(1) | nettle-hash(1) | perl5140delta(1) | prelink(8) | rdfind(1) | rhash(1) | tthsum(1) | xorriso(1)
refer to b2sum(1) | sha224sum(1) | sha256sum(1) | sha384sum(1) | sha512sum(1)
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