The following table describes the typographic changes that are used in this book.
Table P–2 Typographic Conventions| 
 Typeface or Symbol  | 
 Meaning  | 
 Example  | 
|---|---|---|
| 
 AaBbCc123  | The names of commands, files, and directories, and onscreen computer output | 
 Edit your .login file. Use ls -a to list all files. machine_name% you have mail.  | 
| 
 AaBbCc123  | What you type, contrasted with onscreen computer output | 
 machine_name% su Password:  | 
| 
 AaBbCc123  | Command-line placeholder: replace with a real name or value | 
 The command to remove a file is rm filename.  | 
| 
 AaBbCc123  | 
 Book titles, new terms or terms to be emphasized  | 
 Read Chapter 6 in the User's Guide. These are called class options. Do not save the file.  |