[tmux] Reuse terminal workspaces using tmux sessions

In this lesson, we'll learn how to detach from a running tmux session and leave it running in the background. Then, we can re-attach to it later.

We'll cover:
How to exit a session by killing all active panes
- Detaching explicitly with C-b d

- Detaching a specific session with C-b D
- Viewing all running tmux sessions using:

tmux ls

- Reattaching with tmux attach -t

tmux attach -t 0

0 is the session id.

If you want to kill all the sessions in tmux:

killall tmux