Introduction to X11

The X11 system is a suite of programs developed at MIT and in the open-source community over the past two decades. Its current implementation, developed and endorsed by the X.org Foundation, is known as Xorg. As discussed during the coverage of its installation in Chapter 2, “Installing FreeBSD,” X11 has a client/server architectural model that lends itself well to clustered workstation configurations, but it can also work well on a single-user desktop computer as long as you understand the reasoning behind its seemingly curious design—namely, why the separation between the X Server (the windowing system’s heavy-lifting core) and the window manager exists.

Like early versions of Microsoft Windows, X11 is a graphical “shell” ...

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