Definition: nmtui is a text-based user interface for NetworkManager, allowing users to manage network connections from the terminal in a more user-friendly manner compared to nmcli.

Function: Provides an interactive, menu-driven interface for configuring network settings without requiring command-line syntax knowledge.

Features:

 * Configure and manage network connections (both wired and wireless).
 * Activate and deactivate network interfaces.
 * Modify existing network connections.
 * Easy navigation through network settings using keyboard controls.

Usage: Useful for users who prefer a text-based interface over command-line commands and need to manage network settings in environments without a graphical user interface (GUI).

Launch nmtui:

 ```bash
 nmtui
 ```

Main options available in nmtui:

 * '''Edit a connection''': Create, modify, or delete network connections.
 * '''Activate a connection''': Activate or deactivate network interfaces.
 * '''Set system hostname''': Change the system hostname.

nmtui: Text-based user interface for NetworkManager, providing an interactive, menu-driven way to manage network connections.