How to install Skype in Ubuntu.
Either google “Skype” or click Download Skype ( Note that Skype website automatically identify your operating system )
Click Download now button and Choose your Linux Distribution ( I Chosen Ubuntu 10.04 32-bit. Note that if your Ubuntu version is higher than 10.04 you need to choose 10.04 package. Skype package is still old for Ubuntu )
Locate your downloaded file skype-ubuntu_126.96.36.199-1_i386.deb file ( My system it was in Downloads folder ). Right click and open with Ubuntu Software Center and Install.
Latest version Skype 4.0 successfully installed.
If you are using Ubuntu 12.04, Search Skype in HUD. Open skype and enjoy video and audio chatting free of cost !