These essential Linux commands form the basis of your everyday work. It just makes sense to leverage these utilities as much as possible. The whole advantage you could say with Linux is the power and freedom it gives you. With its software repositories and command line environment you can make your computer behave the exact way that you want. You do not have to rely on any other company to allow your computer to run right. This is the importance of Linux and it is why we learn the commands and the way it works.
Linux utilities are the heart and soul of the operating system. They do more than anything in a graphical environment can. For any utility you can see all of its options by using the man command with any utility. So just open a terminal and try them out. Feel free to experiment too.