The operating system supports two different types of keyboards: X server and low function terminal (LFT) keyboards. Although these two keyboard maps appear to be the same, they are separate and distinct.
An X server has an attached keyboard. The server uses mapping tables to manage the mapping of keyboard events. The mapping of an X server keyboard can be changed by using the xmodmap command. This command converts the keyboard so that it returns the key symbol supported by this system. The xmodmap command can also be used to switch keys to more convenient locations.
You can use several commands and operations to control the mapping of LFT keyboards. You can specify which keyboard map is to be used by the LFT subsystem. You can also add new keyboard maps or change existing maps.
The operating system supports three types of keyboards: the 101-key keyboard, 102-key keyboard, and 106-key keyboard. Each keyboard differs slightly in its layout and function.