To install Skype in ubuntu you need the following things:-
First of all, go to System > Administration > Software Sources. >>>> Click Third-Party Software tab. >>>> Add Skype repository by clicking Add and typing the following line in APT line box. >>>> Click Add Source. Now, click Reload. >>>> In the last step, run following command in terminal.
sudo apt-get install skype
>>>> After installation is complete,it can be launched from Application > Internet > Skype.