If you go through the documentation on the dvd::rip site you'll be able to find the package there itself and instructions as well.

SOURCE:

1.3.4 rar (for vobsub compression):

Some special notes about the rar program. MPlayer supports vobsub
files compressed with rar, but you need a 2.x version, 3.x and higher
doesn't work. You can get a 2.x version locally from here:

http://www.exit1.org/dvdrip/contrib/rarlnx271.sfx.bin

I suggest to install the binary to e.g. /usr/local/bin. Then configure
this path using the Preferences dialog.

EDIT:

1. First you need to open terminal and copy the file from its location to /usr/local/bin.


2. Then make the file executable


3. Run the file.

Example : (if the file got downloaded in my Downloads directory)

cp ~/Downloads/rarlnx271.sfx.bin /usr/local/bin/      #copies the file 

cd /usr/local/bin/                                    #changes working directory

chmod +x rarlnx271.sfx.bin                            #makes file executable

./rarlnx271.sfx.bin                                   #runs the file