One of the strengths of UNIX and Unix-like systems is the availability of a standardized and extremely robust command line interface. This interface provides quick access to an extremely wide variety of tasks and permits creation of shell scripts to automate repetitive or complex tasks. Aside from inherently graphical tasks (such as image editing) it is quite possible to operate a Linux almost entirely from a keyboard, thus avoiding the cumbersomeness and carpal-tunnel problems associated with mice. (More at : Linux Command Line.)
Choose cluttered command line over the clean xWindows for faster performance.