md5sum — compute and check MD5 message digest
Print or check MD5 (128−bit) checksums.
With no FILE, or when FILE is −, read standard input.
read in binary mode
read MD5 sums from the FILEs and check them
create a BSD−style checksum
read in text mode (default)
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
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 space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), 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 sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1)
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report md5sum translation bugs to <http://translationproject.org/team/>
Full documentation at: <http://www.gnu.org/software/coreutils/md5sum>
or available locally via: info '(coreutils) md5sum invocation'
Copyright © 2015 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.