tmux

`tmux` lets you run commands in the background and check on them later. When you run a normal bash command, you have to wait for it to finish. With tmux, you can start a command, let it run in the background, and check its output whenever you want.

Key Terms:

- Session: A container that holds your tabs. Like a browser window.
- Tab: A place where one command runs. Like a browser tab. We call this a "window" in tmux.