There are several applications available for recording your desktop (screencasting) in Linux. The most popular method is recordmydesktop, with both KDE and GTK frontends. Some other, less popular...
You can use the frontend, qt-recordMyDesktop, or XVidCap. I would personally recommend recordMyDesktop, unless you need to record only a certain area of the screen.
The desktop is the home screen for your operating system, not to be confused with your homepage for your internet connection. The desktop should contain a tool bar at the bottom (if you are operating...