Have you ever faced the situation where you perform a long-running task on a remote machine and suddenly your connection drops, the SSH session is terminated and your work is lost. Well it has happened to all of us at some point, hasn???t it? Luckily, there is a utility called screen that allows us to the resume our sessions. Screen or GNU Screen, is a terminal multiplexer. In other words, it means that you can start a screen session and then open any number of windows ( virtual terminals ) inside that session. Processes running in Screen will continue to run when their window is not visible even if you get disconnected.