When using UNIX via its command line interface, UNIX displays a prompt that signifies that it is ready to receive a command from the user. The character(s) used by this prompt can be significant. The standard default prompt for the UNIX Super User, the user with universal permissions, who is usually an administrator, is the ‘#’ character. The default prompt for all other users is the ‘$’ character. The prompt can be changed to include information such as the current directory path and command number. See sh(1), csh(1), and ksh(1).