Codex

MD5SUM

Section: User Commands (1)

Updated: March 2015

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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 '(coreutils) md5sum invocation'


Index

NAME

SYNOPSIS

DESCRIPTION

The following four options are useful only when verifying checksums:

BUGS

AUTHOR

REPORTING BUGS

COPYRIGHT

SEE ALSO


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