Conventions Used in This Book

The following typographical conventions are used in this book.

Italic

Used for file and directory names, programs, commands, command-line options, hostnames, usernames, machine names, email addresses, pathnames, URLs, and new terms.

Constant width

Used for variables, keywords, values, options, and IDs. Also used in examples to show the contents of files or the output from commands.

Constant width italic

Used for text that the user is to replace with an actual value.

Tip

These icons signify a tip, suggestion, or general note.

Warning

These icons indicate a warning or caution.

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