Manual: gnumd5sum

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 checksums 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.

       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 pro‐
       grams 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: 
       Report any translation bugs to 

SEE ALSO
       cksum(1)

       Full documentation 
       or available locally via: info '(coreutils) md5sum invocation'

       Packaged by Ubuntu (9.7-3ubuntu2)
       Copyright © 2025 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.

GNU coreutils 9.7					January 2026						   MD5SUM(1)