Knowing what's going on under the hood of your Linux OS is essential for optimizing performance. These commands will give you insight into system resources and processes.

I often profess that Linux can be used without the command line, but at some point, you might want to learn it anyway. When you do, consider these commands.

Linux Journey: Command Line provides a short overview of the most important commands, with associated exercises and interactive quiz questions.

5 terminal commands every Linux newbie should know Sometimes you'll need to use the terminal, but it's not as scary as you think.