md5sum (original) (raw)
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 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 escapingThe 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 in-
put 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 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, im- plemented 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://translationpro- ject.org/team/>
COPYRIGHT Copyright (C) 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'
GNU coreutils 8.30 September 2019 MD5SUM(1)