"A command-line interface (CLI), also known as command-line user interface, 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)."
CLI program a bash, az ed, a hpacucli, stb. stb. Az mc, pine, és társai azok kicsit mások (feature rich full-screen text mode application, ahogy a mc saját oldala állítja).