Linux: Tmux

$ tmux

    [Ctrl + b] ?             <-- Show help. Q to exit help.

    [Ctrl + b] "             <-- Split window vertically.
    [Ctrl + b] %             <-- Split window horizontally.
    [Ctrl + b] space         <-- Select next layout.

    [Ctrl + b] arrow         <-- Select the pane in the arrow direction.
    [Ctrl + b] o             <-- Select the next pane.
    [Ctrl + b] [Ctrl + o]    <-- Rotate panes.
    [Ctrl + b] x or $ exit   <-- Kill the active pane.
    [Ctrl + b] z             <-- Zoom the active pane.

    [Ctrl + b] &             <-- Kill current window. If only one window then exits tmux.
    [Ctrl + b] 0-9           <-- Select window N.
    [Ctrl + b] c             <-- Create a new window.
    [Ctrl + b] n             <-- Select the next window.
    [Ctrl + b] p             <-- Select the previous window.