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Security risks Slows down your server GUIs are often rather limited
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Are you still with me Okay, that means you want to install a GUI. As you saw in the preceding section, installing software is easy with Ubuntu Server. When installing a graphical interface, however, you need to make some choices, the first of which is the kind of graphical interface you want to use. You basically have two different options: the window manager and the desktop environment. In general, a window manager is a program that manages graphical program windows and other graphical elements on your server. A desktop environment is a complete graphical workspace that also offers a wide range of applications. If you have worked with Ubuntu on the desktop, you are probably familiar with the GNOME desktop manager, which is the default graphical user environment for the desktop. Besides window managers and desktop environments, you can also choose to install graphical tools that help you do remote administration of your server. In the next subsections you ll learn how to install these three components. I ll also explain how to turn Ubuntu Server into something very similar to Ubuntu Desktop by installing the complete Ubuntu Desktop graphical interface.
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Installing the GNOME Desktop Manager
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Because you probably want to install a graphical desktop to make managing Ubuntu Server easier, in this section you ll learn how to set up the GNOME desktop. I chose GNOME because it is the most complete graphical desktop environment available for Linux. Installing it is rather easy with apt-get; you just have to know what to install. To install everything that is needed, enter the following command: sudo apt-get install xserver-xorg xfonts* gnome gdm This command makes sure that all required software is copied to your system. Some of the software has to be downloaded from the Internet, and it can take awhile before everything is installed. After that, reboot and you will have a complete graphical user environment, like the one shown in Figure 3-3.
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CHAPTER 3 PERFORMING ESSENTIAL SYSTEM ADMINISTRATION TASKS
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Figure 3-3. It doesn t come by default, but you certainly can manage Ubuntu Server from a graphical interface.
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Note Even if the graphical interface that you have just enabled makes system administration a lot easier,
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installing it doesn t make Ubuntu Server a graphical system. At some points, it makes sense to use a graphical interface, such as if you need a browser to look up some information on the Internet or if you want to install software packages using the Synaptic package management program. In essence, however, system administration on Ubuntu Server happens from the command line. Where relevant, though, I ll indicate which graphical programs can make administration tasks easier for you.
Installing a Lightweight Graphical Environment
Let s face it. GNOME is pretty, but it s also a rather heavy graphical environment. If you want to work with a GUI anyway, it may be a better idea to install a lightweight window manager instead, such as openbox. To install it, use the following command: sudo apt-get install xserver-xorg x-window-system-core openbox You can now start the graphical user environment by running the startx command.
CHAPTER 3 PERFORMING ESSENTIAL SYSTEM ADMINISTRATION TASKS
Installing a Full-Scale Graphical Desktop
You really should not do this because it will turn your Ubuntu Server into a Ubuntu Desktop with all server programs installed; but because some people like to know how to do it, you can install the complete graphical desktop on Ubuntu Server. Before doing so, make sure that you really want to do it because support for your server will be a problem. For example, if there is a conflict between a package that is used by both a core server element and a core desktop element, there is a risk that the desktop element will break server functionality. If you have a support contract with Canonical, it can t help you because the graphical desktop is not supported on Ubuntu Server. You ll also find that not many people on the Internet can help you, either, because very few people want to use this unsupported method. Some people just want to run everything on one computer and instead of running it on Windows, they want to make it an all-Ubuntu computer. One of the cool things about Linux is that you can use it any way you want. To install the full-scale graphical desktop on Ubuntu Server, use the following command: apt-get install ubuntu-desktop
Caution It may look useful to work with a GUI on your server, but you won t get support if you do. So it s
better to avoid it altogether!
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