md5sum − compute and check MD5 message digest
md5sum [OPTION]... [FILE]...
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
read in text mode (default)
following three options are useful only when verifying
don’t print OK for each successfully verified file
don’t output anything, status code shows success
warn about improperly formatted checksum lines
with −−check, exit non−zero for any invalid input
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 sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1)
Written by Ulrich Drepper, Scott Miller, and David Madore.
bugs to bug−email@example.com
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/>
© 2012 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
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.
Manpage server at Ulysses.gnu.org.ua.
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