The following table describes the typographic changes that are used in this book.Typeface or Symbol Meaning Example AaBbCc123 The names of commands, files, and directories, and onscreen computer output Edit your .login file. Use ls a to list all files. machine_name% you have mail. AaBbCc123 What you type, contrasted with onscreen computer output machine_name% suPassword: AaBbCc123 Command-line placeholder: replace with a real name or value The command to remove a file is rm filename. AaBbCc123 Book titles, new terms, and terms to be emphasized Read Chapter 6 in the User's Guide. Perform a patch analysis.Do not save the file.[Note that some emphasized items appear bold online.] The following table shows the default system prompt and superuser prompt for the C shell, Bourne shell, and Korn shell.Shell Prompt C shell prompt machine_name% C shell superuser prompt machine_name# Bourne shell and Korn shell prompt $ Bourne shell and Korn shell superuser prompt #