Fireship·2ytmux in 100 Seconds
tmux is an open-source terminal multiplexer created in 2007 by Nicholas Marriott. It allows users to manage multiple terminal sessions within a single window, providing features such as customizable panes, scripting capabilities, and plugin support. It enhances productivity by allowing quick navigation between sessions without needing a mouse, and sessions persist in the background even if closed. tmux can be installed on Unix-like systems including MacOS, Linux, and WSL.