Screen is a computer authorized full screen window, which imparts physical terminal multiplexer. Screen terminator lets you continue your program even after you have mistakenly logged-off or closed the terminal-emulator. It is generally run with the help of xterm or directly attached serial terminal. It can help running an infinite number of applications like the interactive command shells, text editors and curses based applications. Screen helps the computer in reading emails, compiling and editing codes, web hosting.

Screen helps in remembering a number of scrollback lines. These are needed since you cannot make use of your terminal emulator’s scroll features while the Screen is running on your computer. A stark disadvantage, while using computers is you cannot keep an eye on all the programs, at tandem. Screen, therefore, allows you to use a window silently, which informs you about the completion of a program.

There are no exact ways to exit from Screen. You can just close the terminal and the Screen will be closed. But once the screen starts running, any type of processes continues running until it is not explicitly ended. Screen can be safely detached from one computer and attached to another.

Screen is open source and free software, comes under GNU General Public License. The other marked advantage of Screen is, you can install it in your computer by downloading it from GNU mirror sites and Solaris Companion Software. However, you can modify and distribute this software under the terms of GNU GPL.