For this document we use some common conventions.
|Bold||is used for options to commands.|
|Italic||is used to indicate files, directories, commands and program names when they appear in the body of a paragraph.|
|Constant Width||is used in examples to show the contents of files or the output from commands, and to indicate environment variables and keywords in the body of a paragraph.|
|Constant Bold||is used in examples to show input that is typed literally by the user.|
|[ ]||surrounds optional elements in a description of program syntax. (The brackets themselves should never be typed.)|