Ailurus is an application which tells its users about tricks for enhancing their use of Ubuntu Linux. It puts tricks in tool-tip text and a "Tip of the day" window. It also displays information about the system's BIOS, motherboard, CPU, and battery. It has an interface for changing some GNOME settings. It can install and remove some applications which are not provided in the official Ubuntu apt repository. It can detect the speed of apt mirrors and find the fastest one. It can enable and disable some third party repositories.