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A command-line interface (CLI) is a text-based environment used to interact with a computer’s operating system. Instead of clicking icons or menus with a mouse like in a Graphical User Interface (GUI), you type specific text commands using a keyboard to execute tasks. The Core Terminology

People often use these three terms interchangeably, but they refer to distinct parts of the experience:

Terminal: The window application that displays text and accepts your keyboard inputs.

Shell: The background program that processes your commands and communicates with the computer hardware (e.g., Bash on macOS/Linux or PowerShell on Windows).

Command Line: The literal text space or prompt where your blinking cursor rests, waiting for an input. Why Professionals Use It

While GUIs are easier to learn, the command line offers unique operational advantages: Reddit·r/commandline

Help me understand command line applications : r/commandline