Conventions Used in This Book
Throughout this book certain stylistic conventions are followed. Once you are accustomed to them, you will distinguish between comments, commands you need to type, values you need to supply, and so forth.
In some cases, the typeface of the terms in the main text and in code examples will be different. The details of what the different styles (italic, boldface, etc.) mean are described in the following sections.
In command prompts shown for Unix systems, prompts that begin with # indicate that you need to be logged in as the superuser (root username); if the prompt begins with $, then the command can be typed by any user.
The following typographical conventions are used in this book: