The Software Center also lets you examine the applications installed on the computer already,and remove those you no longer need.
To install a program from the Software Center, you need administrator access and a working Internet connection. start the application from Application ⟶ Ubuntu Software Center
In the Get Free Software section, find the program you want to install. If you already know its name, try typing the name in the search field. Or try searching for the type of program you want (like “spreadsheet”). Otherwise, browse the Software Center departments to find the program.
* Click the program in the list, and click the arrow button to go to the screen for the program.
* Click the Install button. You may need to enter your Ubuntu password before the installation can begin.
* How long a program takes to install depends on how large it is, and the speed of your computer and Internet connection.
While a program is being installed, it appears in the Software Center’s In Progress section. As soon as it disappears, the program is installed.