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

       -t, --text
              read in text mode (default)

   The following three 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

       -w, --warn
              warn about improperly formatted checksum lines

       --strict
              with --check, exit non-zero for any invalid input

       --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 type (`*' for  binary,  `  '
       for text), and name for each FILE.

BUGS
       The  MD5  algorithm should not be used any more for security related pur‐
       poses.  Instead, better use an SHA-2 algorithm, implemented in  the  pro‐
       grams sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1)

AUTHOR
       Written by Ulrich Drepper, Scott Miller, and David Madore.

REPORTING BUGS
       Report md5sum bugs to bug-coreutils@gnu.org
       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/>

COPYRIGHT
       Copyright  © 2011 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.



GNU coreutils 8.12.197-032bb     September 2011                        MD5SUM(1)