Command prompt is used to notify users that CLI is ready to accept commands. Another feature of CLI is command prompt, which is employed as a sequence of characters used in the user interface, or shell. Command line interpreter is used to implement the text-based interface.The Terminal Command file type, file format description, and Mac programs listed on this page have been individually researched and verified by the FileInfo team. Our goal is to help you understand what a file with a *.command suffix is and how to open it.