Install GNOME advanced settings tool in Ubuntu 12.04
How to add the Advanced Settings tool to Ubuntu
Here's how you can install the GNOME advanced settings tool in Ubuntu 12.04.
1. Open a terminal window.
2. Type in the following command, then hit Enter:
sudo apt-get install gnome-tweak-tool
For more, see the original article at the link below.
Install GNOME Advanced Settings | Noobslab