The following typographical conventions are used in this book:
Plain text
Indicates menu titles, menu options, menu buttons, and keyboard accelerators (such as Alt and Ctrl).
Italic
Indicates new terms, example URLs, example email addresses, usernames, hostnames, filenames, file extensions, pathnames, directories, and utilities.
Constant width
Indicates elements of code, configuration options, variables, functions, modules, the contents of files, or the output from commands.
Constant width bold
Shows commands or other text that should be typed literally by the user.
Shows text that should be replaced with user-supplied values.