The following typographical conventions are used in this book:
Used for filenames, directory names, and function names. It is also used for emphasis and for the first use of a technical term.
Constant width
Used for code examples.
Constant width bold
Used occasionally in code examples to highlight statements being discussed.
Indicates a tip, suggestion, or general note. For example, we’ll tell you if a certain feature is version-specific.
Indicates a warning or caution. For example, we’ll tell you if a certain operation has some kind of negative impact on the system.