Name

md5sum

Synopsis

    md5sum [options] [file ...]
    md5sum [options] --check [file]

Compute or check the MD5 algorithm checksum for one or more files. The checksum is computed using the algorithm in RFC 1321. Use the saved output of the program as input when checking. See also sha1sum.

Options

-b, --binary

Use binary mode to read files. This is the default on non-Unix systems.

-c, --check

Check MD5 sums against the given list.

--status

Do not print anything. Instead, use the exit code to indicate success.

-t, --text

Read files in “text” mode. This is the default on Unix systems.

-w, --warn

Warn about checksum lines that are not formatted correctly.

Examples

$ md5sum bash-3.0.tar.gz > MD5SUM      
                     Compute and save checksum
    $ cat MD5SUM                           
                     Show it
    26c4d642e29b3533d8d754995bc277b3  bash-3.0.tar.gz
    $ md5sum --check < MD5SUM              
                     Verify it
    bash-3.0.tar.gz: OK

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