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skin tones of the world s population. This brand was based on the tagline Linux for Human Beings. With Lucid, a new brand called Light was developed. Among other reasons, this name was chosen because Ubuntu is light and represents a break with the bloatware of proprietary operating systems. 2

The default theme in Ubuntu is called Ambiance. Radiance is a similar theme, but with a different color palette. Remember that you ll be working with the theme on a daily basis, so it should be practical and not too distracting. Those miniature Close, Minimize, and Maximize buttons might look stylish, but they re useless if they re so small that you can t reliably click them with your mouse; and if your eyes are constantly wandering to a beautiful but overpowering title bar, you won t be concentrating on your work or play. Depending on the theme you select, the Close, Minimize, and Maximize buttons can be in different places in the top bar of each window. Ambiance in particular sets them to the left in the following order (from left to right): Close, Minimize, and Maximize, whereas Clearlooks uses a more traditional, Windows-like positioning and order. In addition to changing the overall theme, you can also modify individual theme components and even download more theme components.

An NTP time server can perform its work in two different ways: by pushing (broadcasting) time across the network, or by allowing other servers to pull the time from it In the default setting, the NTP server that gets its time from somewhere else regularly asks this server what time is used When both nodes have their times synchronized, this setting will be incremented to a default value of 1,024 seconds As an administrator, you can specify how often time needs to be synchronized by using the minpoll and maxpoll arguments on the line where the NTP time server is referred to as in Listing 9-13 Listing 9-13 Configuring the Synchronization Interval server 12712710 fudge 12712710 stratum 10 server ntpprovider.

You can alter the five aspects that constitute a GNOME theme: the controls (sometimes known as widgets), color scheme, window borders, icons, and mouse pointer. To make changes to a theme, select it on the Theme tab of the Appearance Preferences dialog box and then click the Customize button. You will see the Customize Theme dialog box, as shown in Figure 9-2.

Listing 2-22. Retrieving the Members in Order of LastName SELECT * FROM Member m ORDER BY m.LastName

Figure 9-2. You can customize a theme by choosing your own controls, colors, window border, icons, and mouse pointer. Click each tab to see your choices: Controls: These are the elements you click within dialog boxes and windows: buttons, scrollbars, check boxes, radio buttons, and so on. The chief difference between one set of controls and another relates to their 3D effect some are inset against the background, and some appear to be prominent. Some controls are shiny, and some appear flat. Additionally, some are rounded and some are square. Rounded controls feel more friendly, maybe even playful, while square controls tend to feel more businesslike. Colors: You can set the background and text color of windows, input boxes, selected items, and tooltips. However, note that controls nearly always come with their own color schemes, which override any changes you make to color settings. A few controls not only override color settings, but also do not support tweakable color schemes. Examples include the HighContrastInverse and HighContrastLargePrintInverse controls. If you adjust these, ensure that you have enough contrast between the various elements; otherwise, you may end up with eye strain or a headache! Window Border: The options on this tab control the borders of program windows and dialog boxes. Particular attention is paid to the top of the window, where the program name appears along with the Close, Minimize, and Maximize buttons. Icons: This tab lets you control which icon set is in use. An icon set includes icons for everything you see on the screen or in menus, including folders, the Trash, programs, hard disks, network servers, and so on. Selecting a new icon set will change all icons.