This book follows certain typographical conventions:
- Italic
Italic is used to indicate URLs, filenames, directories, commands, options, system components (such as usernames), and to highlight comments in examples.
-
Constant Width
Used to show the contents of files or the output from commands.
- 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
Used to show arguments and variables that should be replaced with user-supplied values.
-
#, $
Used in some examples as the root shell prompt (
#
) and as the user prompt ($
) under the Bourne or Bash shell.
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, -w
n
(no intervening space) might be interpreted differently from -w
n
. It's important to notice the spacing used in option syntax.
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