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
- -t, --text
- read in text mode (default)
The following three 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
- -w, --warn
- warn about improperly formatted checksum lines
- --strict
- with --check, exit non-zero for any invalid
input
- --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 type (`*' for binary, ` ' 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¶
Report md5sum bugs to bug-coreutils@gnu.org
GNU coreutils home page: <
http://www.gnu.org/software/coreutils/>
General help using GNU software: <
http://www.gnu.org/gethelp/>
Report md5sum translation bugs to <
http://translationproject.org/team/>
COPYRIGHT¶
Copyright © 2011 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.
