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MD5SUM

Section: User Commands (1)
Updated: February 2017
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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 five options are useful only when verifying checksums:

--ignore-missing
don't fail or report status for missing files
--quiet
don't print OK for each successfully verified file
--status
don't output anything, status code shows success
--strict
exit non-zero for improperly formatted checksum lines
-w, --warn
warn about improperly formatted checksum lines
--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 space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), 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

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report md5sum translation bugs to <http://translationproject.org/team/>  

COPYRIGHT

Copyright © 2016 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

Full documentation at: <http://www.gnu.org/software/coreutils/md5sum>
or available locally via: info '(coreutils) md5sum invocation'


 

Index

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

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