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NAME | SYNOPSIS | DESCRIPTION | BUGS | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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MD5SUM(1) User Commands MD5SUM(1)
md5sum - compute and check MD5 message digest
md5sum [OPTION]... [FILE]...
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.
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)
Written by Ulrich Drepper, Scott Miller, and David Madore.
GNU coreutils online help:
<https://www.gnu.org/software/coreutils/>
Report any translation bugs to
<https://translationproject.org/team/>
Copyright © 2025 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.
cksum(1)
Full documentation <https://www.gnu.org/software/coreutils/md5sum>
or available locally via: info '(coreutils) md5sum invocation'
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-9.6.tar.xz fetched from
⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2025-02-02. 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 9.6 January 2025 MD5SUM(1)
Pages that refer to this page: mcookie(1), pmlogmv(1), deb-md5sums(5), prelink(8)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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