md5sum - compute and check MD5 message digest
[-bhtvV] [-c file] [-s[string]] [--binary] [--check=file]
[--help] [--string[=string]] [--text] [--verbose] [--version]
This manual page
documents the GNU version of
produces for each input file a 128-bit "fingerprint" or "message-digest"
or it can check with the output of a former run whether the message digests
are still the same (i.e. whether the files changed).
Treat all input files as binary. This normally does not make any difference
on UN*X systems but some systems have a different internal and external
representation of texts (especially the end-of-line characters).
file should be the output of a former run of
The file has in each line the MD5 sum, a binary/text flag, and a file name.
This file will be opened (with each possible relative path) and the message
digest is computed. If it is not the same as given in this line it will be
marked as failed.
Print a usage message and exit.
Instead of computing the message digest for a file compute it for the given
string. The result is the same as for a file with contains exactly
Treat all input files as text files. This is the reverse option to
Verbosely write information about the process.
Print version information on standard output then exit.