How to install Skype on Linux systems

http://www.omgubuntu.co.uk/wp-content/uploads/2012/11/skype-4-1-for-linux.jpg
First Download :

32/64 bits : http://www.skype.com/fr/download-skype/skype-for-linux/ (Choice the same version for your OS Ex:Backtrack = Ubuntu 10.04 / Kali=Debian 7.0)
Than open console and type :
cd [floder of downloads] 
than:
sudo dpkg -i [file of skype]
exemple for ubuntu
sudo dpkg -i skype-ubuntu_2.2.0.35-1_i386.deb