md5sum(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | BUGS | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON

MD5SUM(1)                     User Commands                    MD5SUM(1)

NAME         top

       md5sum - compute and check MD5 message digest

SYNOPSIS         top

       md5sum [OPTION]... [FILE]...

DESCRIPTION         top

       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         top

       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         top

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

REPORTING BUGS         top

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

COPYRIGHT         top

       Copyright © 2020 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         top

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

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project
       can be found at ⟨http://www.gnu.org/software/coreutils/⟩.  If you
       have a bug report for this manual page, see
       ⟨http://www.gnu.org/software/coreutils/⟩.  This page was obtained
       from the tarball coreutils-8.32.tar.xz fetched from
       ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2021-04-01.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

GNU coreutils 8.32             March 2020                      MD5SUM(1)

Pages that refer to this page: mcookie(1)prelink(8)