Since its first release in 2004, Ubuntu has grown to become a driving force among the popular Linux distributions. From giving away free CDs (before broadband was widely available) to its long-term support releases, Ubuntu has often caused a stir. For some, it is the user interface that causes a problem. Where is GNOME? Where is KDE? Fortunately Ubuntu has several officially sanctioned derivatives that provide other desktop environments or tweak Ubuntu for specific purposes.