Installing Skype on Ubuntu

To install Skype on Ubuntu, follow these steps :

sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"
sudo apt-get update
sudo apt-get install skype

After the installation, type skype in the terminal to open it.

Installing Nvidia Drivers on Ubuntu

Without installing the display drivers, you will notice that the performance is the system is pretty poor, which becomes clearly visible while watching videos. So here's how you install the Nvidia drivers on Ubuntu :

sudo apt-get install build-essential linux-source linux-headers

After running this command, you might get an error saying : Package 'linux-headers' has no installation candidate. Ignore the error and continue to the next step.

sudo apt-get install linux-headers-`uname -r` 

sudo apt-get install nvidia-current