8. Conventions Used in This Book
All examples presented in this book assume you are using a sh compatible shell. The bash shell is sh compatible and is the standard shell of all Linux distributions. If you happen to be a csh user, you will have to make appropriate adjustments.
The following is a list of the typographical conventions used in this book:
- Italic
Used for file and directory names, program and command names, command-line options, email addresses and pathnames, URLs, and for emphasizing new terms.
- Boldface
Used for machine names, hostnames, site names, usernames and IDs, and for occasional emphasis.
- Constant Width
Used in examples to show the contents of code files or the output from commands and to indicate environment variables and keywords that appear in code.
- Constant Width Italic
Used to indicate variable options, keywords, or text that the user is to replace with an actual value.
- Constant Width Bold
Used in examples to show commands or other text that should be typed literally by the user.
 | Text appearing in this manner offers a warning. You can make a mistake here that hurts your system or is hard to recover from. |