Choose the correct mouse type for your system.
Do you have a PS/2, Bus or serial mouse? (Hint: If the connector your mouse plugs into is round, it is a PS/2 or a Bus mouse; if rectangular, it is a serial mouse.)
Try to find an exact match. If an exact match cannot be found, choose one which is compatible with yours. Otherwise, choose the appropriate Generic mouse type.
If you have a serial mouse, pick the device and port it is connected to in the next box.
In Red Hat Linux Advanced Server, the graphical environment (X Window System) is designed to make use of a three-button mouse. If you have a two-button mouse, select the Emulate 3 buttons option. After the installation, you can click both mouse buttons at once to act as the middle mouse button.