MD5SUM

Section: User Commands (1)
Updated: March 2016
Index Return to Main Contents
 

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
--tag
create a BSD-style checksum
-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 input mode ('*' for binary, space for text), 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

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 © 2013 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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
The following three options are useful only when verifying checksums:
BUGS
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:52:11 GMT, January 21, 2018