help

The help command prints information about messages that may appear on the user's terminal. Arguments to help are the code numbers that appear in parentheses at the end of SCCS messages. (If no argument is given, help prompts for one.) Explanatory information is printed on the standard output. If no information is found, an error message is printed. When more than one argument is used, each is processed independently, and an error resulting from one will not stop the processing of the others. For more information, see the help(1) page.