The command line (CL) is one of the most powerful features of Linux. If you have familiar with Linux command line enough, you do not even need any computer mouse, keyboard is your weapon. There exists a sea of Linux command line tools, allowing you to do almost everything you can think of doing on your Linux PC. However, this usually creates a problem: with so many commands available to use, you don't know where and how to start learning them, especially when you are beginner. Therefore, I would like to suggest you, especially who just starts Linux, to watch this very useful playlist.
Rangsiman Ketkaew