The Command Line Interface or CLI is an interface which accepts commands from the user, similar to Windows Command Prompt or Linux Terminal. Check also Text UI.
To implement a minimal CLI, you need at least:
- Access to video memory
- Keyboard driver
- String input and comparison
- Some functions to execute on commands
Because of their ease of implementation, CLI's are popular in hobby OS projects.
- Speed and control
- Less resources needed
- Scripts to automate tasks
- No need for mouse devices and drivers
- Hard for beginner users