Introduction to the X Window System

In many ways, it's easier to explain how the X Window System is different from the interface that you're accustomed to than it is to explain how it's similar. Whether you're from a Mac or a PC background, you're certainly used to a graphical user interface, and both the X Window System and the interface to which you're accustomed display windows with program content and information in them. But beyond this, the X Window System is fundamentally a different interface than the GUI present on either of the popular desktop operating systems.

At the most obvious level, the X Window System is not a built-in part of the operating system. Whereas the Mac OS and Windows graphical user interfaces are intimately tied to ...

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