Usage message (original) (raw)

In computer programming, a usage message or help message refers to a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program. Usage messages are utilized as a quick way for a program to inform the user of proper command syntax, and should not be substituted for proper error messages or for detailed documentation such as a man page.