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Screen is a full-screen window manager that multiplexes a physical terminal between several processes. In short, you can have a few virtual terminal by using only one physical terminal. Screen is useful when you are accessing servers remotely, or running jobs on the background. When you want to run jobs on the background, it is very useful to run it inside one screen so that you can detached it, and simply log out without worry. Below are a few useful command to be used with screen to get you started.