Tmux terminal multiplexer

Installing tmux in Debian 
 sudo apt-get install tmux 
 To start tmux, just type it and hit Enter: 
 tmux 
 A Ctrl+B Cheat Sheet 
 We've included a cheat sheet of the different commands you can use in tmux below. 
 Session Commands 
 
 S : List sessions. 
 $ : Rename current session. 
 D : Detach current session. 
 Ctrl+B, and then ? : Display Help page in tmux . 
 
 Window Commands 
 
 C : Create a new window. 
 , : Rename the current window. 
 W : List the windows. 
 N : Move to the next window. 
 P : Move to the previous window. 
 0 to 9 : Move to the window number specified. 
 
 Pane Commands 
 
 % : Create a horizontal split. 
 " : Create a vertical split. 
 H or Left Arrow: Move to the pane on the left. 
 I or Right Arrow: Move to the pane on the right. 
 J or Down Arrow: Move to the pane below. 
 K or Up Arrow: Move to the pane above. 
 Q : Briefly show pane numbers. 
 O : Move through panes in order. Each press takes you to the next, until you loop through all of them. 
 } : Swap the position of the current pane with the next. 
 { : Swap the position of the current pane with the previous. 
 X : Close the current pane. 
 
 BRON:  How to Use tmux on Linux (and Why It's Better Than Screen)