Wikipedia
A command-line user interface (CLI), also known as a console user interface, and character user interface (CUI), is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines). A program which handles the interface is called a command language interpreter or shell.
The CLI was the primary means of interaction with most computer systems until the introduction of …
Command-line interface - Wikipedia, the free encyclopedia