= screen =
Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
When screen is invoked, it executes initialization commands from the files .screenrc in the user’s home directory and /usr/local/etc/screenrc. 

 * http://www.gnu.org/software/screen/manual/screen.html
 * screen -AdmS session1 -t tab1 /bin/bash
 * screen -r <saessionName> # attach to session
 * Ctrl+a Ctrl+d # detach from active session
 * Ctrl+a Ctrl+b # next tab
 * screen -ls # list sessions
 * screen -S  1234.session1 -X quit # terminate session