Brackets are used when describing optional parts of a command.

In a command description, text in italics represents information you enter. Elsewhere, italics is used for emphasis.

In a command description, bold text represents keywords or options that must be entered exactly as displayed. Elsewhere, it represents words that are used in a programmatic way rather than their normal way.

Example text

In program listings, this represents a program or something you’d enter in response to a shell or CLI prompt. Bold text here indicates exactly what you should type. If you’re viewing this information online, example text is in color.

This graphic symbol indicates that the information that follows — which is printed in bold—is a note or warning .