Shutter is a feature-rich screenshot program to take a screenshot of a specific area, window, your whole screen, or even of a website.
For other screenshot tools click here.
1.Open ubuntu software center. To open ubuntu software center click Applications icon from unity launcher. And type ubuntu software center in the search applications field.Then click ubuntu software center
2.Type shutter in the search box.
3.click install button.
4.Type your ubuntu password if needed.
5.After the successful installation click Applications icon from unity launcher. And type shutter in the search applications field.And click shutter to open.