md5sum1
Compute and check md5 message digest
Usage
md5sum [OPTION] ...
[FILE] ...
Overview
Print or check MD5 (128-bit) checksums. Legacy interface to the cksum(1) utility.
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.
Releases
19 releases since Debian 1.1 (Buzz); the text changed 13 times.
--binary since Debian 4.0 (Etch);
--check since Debian 4.0 (Etch);
--help since Debian 4.0 (Etch);
--ignore-missing since Debian 9 (Stretch);
--quiet since Debian 6.0 (Squeeze);
--status since Debian 4.0 (Etch);
--strict since Debian 7 (Wheezy);
--tag since Debian 8 (Jessie);
--text since Debian 4.0 (Etch);
--version since Debian 4.0 (Etch);
--warn since Debian 4.0 (Etch);
--zero since Debian 10 (Buster);
-t since Debian 4.0 (Etch);
-w since Debian 4.0 (Etch);
-z since Debian 10 (Buster).
-v until Debian 3.1 (Sarge).