Tmux and screen have modes that allow you to 'watch' a window for activity, and alert you to this. They can even watch for inactivity, and warn you when somethi

Tmux and screen have modes that allow you to 'watch' a window for activity, and alert you to this. They can even watch for inactivity, and warn you when something finishes. You can also use "echo ^v^g" (where ^ is ctrl) to summon a bell, tmux and screen can be configured to alert you to such a bell.