md5sum
compute and check MD5 message digest
- Provided by: coreutils (Version: 8.25-2ubuntu3~16.04)
- Report a bug
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 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 former 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 insignificant), 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 © 2016 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'