Conventions Used in This Book

This book uses some typographic conventions that can help you navigate through the text easily. When you see certain kinds of typefaces, you’ll know they have special meanings:

Italic

Used to show arguments and variables that should be replaced with user-supplied values. Italic is also used to indicate filenames and directories 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 to show commands or other text that should be typed literally by the user.

Constant Width Italic

Used in examples to show text that should be replaced with user-supplied values.

Tip

This icon signifies a tip, suggestion, or general note.

Warning

This icon indicates a warning or caution.

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