md5sum man page on Oracle
[printable version]
MD5SUM(1) User Commands MD5SUM(1)
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)
Note: There is no difference between binary and text mode option
on GNU system.
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.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report md5sum translation bugs to <http://translationproject.org/team/>
BUGS
The MD5 algorithm should not be used any more for security related pur‐
poses. Instead, better use an SHA-2 algorithm, implemented in the pro‐
grams sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1)
AUTHOR
Written by Ulrich Drepper, Scott Miller, and David Madore.
COPYRIGHT
Copyright © 2013 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
The full documentation for md5sum is maintained as a Texinfo manual.
If the info and md5sum programs are properly installed at your site,
the command
info coreutils 'md5sum invocation'
should give you access to the complete manual.
GNU coreutils 8.22 May 2014 MD5SUM(1)
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