How did I manage to go for so long without knowing about screen? screen allows you to create several connection sessions to a terminal, switch between them, detach from them, then reconnect from anywhere. I’d previously had to to set up long-running remote jobs as background jobs, relying on nohup and various methods to prevent terminal output. But no more!
This page taught me all I know about screen: screen: Keep Your Processes Running Despite A Dropped Connection