April 05, 2013, 1:55 PM — Here's how you can install the ImmUnity theme to your Ubuntu computer.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo mv /usr/share/themes/Ambiance /usr/share/themes/Ambiance.old
sudo tar xvfz 150278-Immunity.tar.gz -C /usr/share/themes
For more, see the original article at the link below.
ImmUnity: Unity compatible Ubuntu theme | Fresh Tutorial