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

--tag
    create a BSD-style checksum

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

-z, --zero
    end each output line with NUL, not newline, and disable file name escaping

  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.

Note: There is no difference between binary mode and text mode on GNU systems.

BUGS
Do not use the MD5 algorithm for security related purposes. Instead, use an SHA-2 algorithm, implemented in the programs sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2 algorithm, implemented in b2sum(1)

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

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

COPYRIGHT
Copyright © 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://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: <https://www.gnu.org/software/coreutils/md5sum>
or available locally via: info '(coreutils) md5sum invocation'