The X Server

The X Server is the underlying framework that allows graphical applications to run. By itself, the X Server is not very useful—it’s just a mechanism for controlling basic window placement and application window painting, and it contains no window-management functions such as the ability to move a window by dragging it with a mouse. Figure 5.1 shows an X Server running with no window manager.

Figure 5.1. Here you see a very bland and rather useless X session, running without a window manager.

Several applications are running in the X11 session shown in Figure 5.1: an xterm (a command shell terminal window), ...

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