Shell Windows with Tmux: Multiple Terminals
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The tmux command is very versatile and allows the use of "Windows" in the Shell. It is very useful for debugging problems, viewing logs, and fixing errors

To install tmux
To install TMUX, you can use the following commands depending on your Linux flavor:
On Debian and Ubuntu:
apt-get install tmux
On CentOS, Red Hat:
yum install tmux
On Fedora:
dnf install tmux
- [CTRL+b] % - To create a horizontal pane
- [CTRL+b] " - To create a vertical pane
- [CTRL+b] x - To kill the pane;
- [CTRL+b] z - To zoom in on a pane;
- [CTRL+b] : - use arrows to switch between panes
That was just one piece. The course teaches the whole path — from your first command to exam day.