Navigating the X Window System
The X Window System presents several windows to the user, and each shows the output of an X application called a client. The client can be running on the user's PC, which is more than likely with Linux, or on another workstation on the network.
How you move around in the X Window System very much depends on your window manager. Most window managers use an onscreen pointer called a cursor to indicate where you're working. The cursor can take on many shapes, depending on what you're doing and what window manager you're running.
The X Window System, like most graphical user interfaces (GUIs), allows input from the keyboard and a pointing device, which is usually a mouse. Typically, for a window to accept input, it must ...
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