Skype is a proprietary voice-over-Internet Protocol (VoIP) service and software application.The service allows users to communicate with peers by voice using a microphone, video by using a webcam, and instant messaging over the Internet. Phone calls may be placed to recipients on the traditional telephone networks. Calls to other users within the Skype service are free of charge, while calls to landline telephones and mobile phones are charged via a debit-based user account system. Skype has also become popular for its additional features, including file transfer, and videoconferencing. Competitors include SIP and H.323-based services, such as Linphone, as well as the Google Talk service, Mumble and Hall.com.
Install latest version of Skype 4.1 in Ubuntu 12.10
Preparing your system
First you need to enable canonical partners repositories to do this open software sources application once it opens go to edit click on Software Sources...
Now software sources windows opens here you need to click on Other Software tab
You need to put check next to canonical partners box
Now you need to update the software sources list using the following command from your terminal
sudo apt-get update
Install Skype using the folloiwng command
sudo apt-get install skype
Once installation completed you can search skpe from your dashboard and double click to open skype application