The following is a list of the typographical conventions used in this
Used to indicate new terms, URLs, filenames, file extensions,
directories, program names, and, of course, for emphasis. For
example, a path in the filesystem will appear as
- Constant width
Used to show code examples, anything that might be typed from the
keyboard, the contents of files, and the output from commands.
- Constant width italic
Used in examples and tables to show text that should be replaced with
your own user-supplied values.
You should pay special attention to notes set apart from the text
with the following icons:
This is a tip, suggestion, or general note. It contains useful
supplementary information about the topic at hand.
This is a warning or note of caution. When you see one of these, your
safety, privacy, or money might be in jeopardy.
The thermometer icons, found next to each hack, indicate the relative
complexity of the hack: