md5sum - compute and check MD5 message digest
Print or check MD5 (128-bit) checksums. With no FILE, or when FILE is -, read
- -b, --binary
- read in binary mode
- -c, --check
- read MD5 sums from the FILEs and check them
- create a BSD-style checksum
- -t, --text
- read in text mode (default)
The following four options are useful only when verifying checksums:¶
- don't print OK for each successfully verified file
- don't output anything, status code shows success
- exit non-zero for improperly formatted checksum lines
- -w, --warn
- warn about improperly formatted checksum lines
- display this help and exit
- 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.
The MD5 algorithm should not be used any more for security related purposes.
Instead, better use an SHA-2 algorithm, implemented in the programs
Written by Ulrich Drepper, Scott Miller, and David Madore.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/
Report md5sum translation bugs to <http://translationproject.org/team/
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.
Full documentation at: <http://www.gnu.org/software/coreutils/md5sum
or available locally via: info '(coreutils) md5sum invocation'