Certain words in this manual are represented in different fonts, styles, and weights. This highlighting indicates that the word is part of a specific category. The categories include the following: Courier font Courier font represents commands, file names and paths, and prompts . When shown as below, it indicates computer output: Desktop about.html logs paulwesterberg.png Mail backupfiles mail reports bold Courier font Bold Courier font represents text that you are to type, such as: service jonas start If you have to run a command as root, the root prompt (#) precedes the command: # gconftool-2 italic Courier font Italic Courier font represents a variable, such as an installation directory: install_dir/bin/ bold font Bold font represents application programs and text found on a graphical interface. When shown like this: OK , it indicates a button on a graphical application interface. Additionally, the manual uses different strategies to draw your attention to pieces of information. In order of how critical the information is to you, these items are marked as follows: A note is typically information that you need to understand the behavior of the system. A tip is typically an alternative way of performing a task. Important information is necessary, but possibly unexpected, such as a configuration change that will not persist after a reboot. A caution indicates an act that would violate your support agreement, such as recompiling the kernel. A warning indicates potential data loss, as may happen when tuning hardware for maximum performance.