| 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 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.
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.
| November 2020 | GNU coreutils 8.22 |