Installing Skype on ubuntu 10.04

Since ubuntu  10.04 Skype is part of the Canonical partner repository . Hence you can to install Skype  easily.  

    To install Skype in Ubuntu 10.04 Lucid Lynx from the partner repository, go to System > Administration > Software Sources and on the "Other software" tab, enable (check the box next to it) the "http://archive.canonical.com/ubuntu lucid partner" repository.
Now open a terminal and type 

$ sudo aptitude update && sudo aptitude install skype

Enjoy skype