[GNU Screen](http://www.gnu.org/software/screen/) is a software application that can be used to multiplex several virtual consoles.
GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
- GNU screen official page: downloads and documentation;
- screen command reference;
- introductory article from kuro5hin.org, GNU Screen: an introduction and beginner's tutorial;
- Introduction to using the scrollback buffer for copy and paste within