Resource recommendations for designing graphical + command line interfaces?

1. When it would be better to use the CLI over a GUI?
2. What makes a good CLI?
3. What is command line and GUI tools for user management?

When it would be better to use the CLI over a GUI?

CLI is more preferred by professionals looking for performance and speed. With GUI, one has to navigate through different icons. This makes GUI slow. But with CLI, one only needs to utilize the keyboard to navigate through the interface.

What makes a good CLI?

Where possible, a CLI should follow patterns that already exist. That's what makes CLIs intuitive and guessable; that's what makes users efficient. That being said, sometimes consistency conflicts with ease of use.

What is command line and GUI tools for user management?

Graphical User Interface (GUI) and Command Line Interface (CLI) are the two means of interaction between a user and an electronic device. A GUI is a graphical representation in which the users can interact with software or devices through clickable icons.