CLI (Command Line Interface) is the text-based command interpreter for AmigaDOS, providing users with a prompt-driven environment to execute commands, run scripts, and manage files without using the graphical Workbench. In AmigaOS 1.x, the CLI was loaded separately from a boot disk and offered basic functionality, while AmigaOS 2.0 introduced the enhanced Shell to replace it, though "CLI" remained the generic term for command-line operations. It supports redirection, piping, and batch processing through script files, serving as a powerful tool for advanced users and system automation.