Index, which provides page references to the topics and commands covered in this publication. Variables for which you supply values are in italics . A string is defined as a nonquoted set of characters. Information you enter is in a boldface screen font . It ususally refers to helpful suggestions, the writer's assumptions, or reference to materials not contained in this manual.
Caution is a special paragraph that means reader be careful .
It means that you are capable of doing something that might result in equipment damage, or worse, that you might have to take something apart and start over again.