tmux

tmux new-session   -d -s <session_name> "<command> <arguments>"
tmux list-sessions
tmux has-session   -t <session_name>
tmux attach        -t <session_name>
tmux kill-session  -t <session_name>
tmux list-clients  -t <session_name>
tmux kill-server
tmux list-commands

C-b ?        List of keyboard shortcuts.

C-b d        Detach from session.
C-b s        Choose a session from a list.

C-b, %       Split screen in half from left to right
C-b, ""      Split screen in half from top to bottom (one double quote)

C-b, x       Kill the current pane
C-b, arrow   Switch to the pane in direction of arrow key