What is a Command Line Interface (CLI)?

A Command Line Interface (CLI) is defined as a user interface that allows users to interact with a computer system by typing commands. This interface contrasts with graphical user interfaces (GUIs), where users manipulate visual elements with a mouse or touchscreen. The CLI provides direct access to the system's functionality by allowing users to enter commands in a text format, which can be more efficient for experienced users who prefer a keyboard-driven approach.

Using a CLI can often lead to increased productivity in performing tasks such as file management, system configuration, and executing programs, as it enables quick access to commands and the ability to automate tasks through scripting. The clarity and precision of the CLI can be advantageous in situations where specific commands need to be executed in a controlled manner, as well as in programming and IT management environments.