X and GUI: Desktop, Window, and Mouse
A user interface is the connection between the user and, in this case, the computer system (Figure 6-1). The user interface controls how the user interacts with the system. In addition to using a GUI, some readers may want to use the command line interface. A terminal emulator window enables you to use a command line interface from within a GUI. Using a GUI doesn't mean giving up the command line interface but rather having more choices about how to perform a task.
Figure 6-1. KDE desktop environment under Red Hat
tip || Which Mouse Button?
In general, the left mouse button selects and drags, whereas the right ...
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