**screen** sudo apt-get install screen pour avoir plusieurs terminals
		**ctrl-a |** split vertically
		**ctrl-a S** split horizontally
		**ctrl-a Q** unsplit all
		**ctrl-a X** close current pane
		**ctrl-a K** kill current pane
		**ctrl-a \** kill all sessions (if it doesn't work see below)
			**ctrl-a d** get out of screen
			**screen -ls** see list of sessions
			**screen -XS 42353 quit** -X execute command, -S session PID to execute on, five digit number specific at the session
		**ctrl-a d** get out of screen without killing it then run: screen -r to recover session
		**ctrl-a tab** switch from one splited window to another
		**ctrl-a n** or **p** move to the next or previous windows
		**ctrl-a c** start new terminal (in the new window)
		**screen** prompt command "screen" to open a new window in the same directory
		**ctrl-a space** next terminal
		**ctrl-a backspace** previous terminal
		**ctrl-a ctrl a** flip flop between to terminal
		**ctrl-a "** switch between terminal with a list
			**,** move windows number down
			**.** move windows number up
		**ctrl-a A** rename
		**ctrl-a l** resize
		**ctrl-a w** show windows name
		**ctrl-a esc** go in scroll mode (press esc again to axit)
		**ctrl-a :** enter command line
			** scrollback 10000** set number of line in the buffer

to configure actions when launch :
**vim ~/.screenrc ** go to or create file screenrc, then write inside:
	**startup_message off** avoid message at start
	**chdir -directorie-** change the working directorie
	**screen -t -name- -action-** start a windows with a name and execute action (for example: screen -t shell vim /Bureau/fiche/chell.txt)
	**focus** focus on next screen