Command line is one of the many strengths of Linux based systems. Why is it a strength? There is no one answer; there are many answers. I agree that the graphical user interface (GUI) makes it easier for a user to interact with their system and that’s what new users may need to get started with Linux; that’s what I needed when I was starting off with Linux back in 2005. But as I matured as a user I found CLI (command line interface) was more efficient than fiddling with the buttons of a tool.