Lets you switch easily between several programs in one terminal.
sudo apt install tmux
tmux
usage: tmux [-2CluvV] [-c shell-command] [-f file] [-L socket-name]
[-S socket-path] [command [flags]]
tmux
ctrl + b; d
tmux attach -t <name-or-id>
tmux ls
tmux new-session -d -s "<session-name>" "command-to-run"