The modern answer is the tmux terminal multiplexer ... For example, do you really need a status bar that shows you CPU load at all times? Cool, yes, but not always a practical win.

Terminal multiplexers allow you to run multiple commands in different virtual terminals within one terminal. Multiplexers ...

What is Tmux and why do developers love it? In just 100 seconds, learn the basics of Tmux, the open-source terminal multiplexer that lets you manage multiple terminal sessions from a single window.