Noobs getting their first taste of the Linux OS tend to feel a little lost. Even though the Gnome and KDE GUIs are simple and easy to navigate, it's hard to ignore the realization that you don't really know what lurks beneath the surface of this powerful operating system. And many of those who do venture to the command prompt to do a little exploring tend to back away slowly after peeping the unfamiliar and slightly intimidating Unix-like directory structure.