Almost any Linux enthusiast would say that you can get things done twice as quick using the command line versus any GUI, especially if you know your way around. The Linux Bash shell is very flexible and allows for much tweaking.
By adding directories to the $PATH variable, we can save time and forget about changing into so many directories.
In the home directory there is a file named ~/.profile. Any commands that you enter into this file will be executed upon login. When you execute a command, for example ls, the bash shell automatically knows where to look because /bin resides in the $PATH variable.