| This book uses the following typographical conventions: -
- Italic
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Used for commands, programs, and options. Italic also indicates new terms, URLs, filenames and file extensions, and directories. -
- Constant Width
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Used to show the contents of files or the output from commands. Constant width is also used to indicate domains, types, roles, macros, processes, policy elements, aliases, rules, and operations. -
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Constant Width Bold -
Used in examples and tables to show commands or other text that should be typed literally by the user . -
- Constant Width Italic
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Used in examples and tables to show text that should be replaced with user-supplied values.  | This icon signifies a tip, suggestion, or general note. | |
 | This icon signifies a warning or caution. | |
A final word about syntax: in many cases, the space between an option and its argument can be omitted. In other cases, the spacing (or lack of spacing) must be followed strictly . For example, -wn (no intervening space) might be interpreted differently from -w n . It's important to notice the spacing used in option syntax. Keyboard Accelerators In a keyboard accelerator (such as Ctrl-Alt-Del), a dash indicates that the keys should be held down simultaneously, whereas a space means that the keys should be pressed sequentially. For example, Ctrl-Esc indicates that the Control and Escape keys should be held down simultaneously , whereas Ctrl Esc means that the Control and Escape keys should be pressed sequentially. IF a keyboard accelerator contains an uppercase letter, you should not type the Shift key unless it's given explicitly. For example, Ctrl-C indicates that you should press the Control and C keys; Ctrl-Shift-C indicates that you should press the Control, Shift, and C keys. |
