The OpenStack documentation uses several typesetting conventions: Admonitions take three forms: This is a note. The information in a note is usually in the form of a handy tip or reminder. This is important. The information in an important admonition is something you must be aware of before moving on. This is a warning. The information in warnings is critical. Warnings provide additional information about risk of data loss or security issues. Commands prefixed with the # prompt are to be executed by the root user. These examples can also be executed using the sudo command, if available. Commands prefixed with the $ prompt can be executed by any user, including root.