What command displays detailed information about a specific network device?

The command that provides detailed information about a specific network device is nmcli dev show devicename. The nmcli command is part of NetworkManager, which is a tool used to manage network connections in Linux systems. When you use nmcli dev show, it retrieves comprehensive information about the specified network device, including its state, IP addresses, MAC address, and other configuration details.

Using nmcli dev show devicename, you get a structured output that clearly lists all relevant properties of the network device, making it easy to diagnose network issues or understand the current configuration. This level of detail is particularly advantageous for system administrators and engineers who need to manage complex networking setups effectively.

While other commands like ip addr show and ifconfig can also provide information about network interfaces, they typically focus more on addressing information rather than the broader configuration details that nmcli offers. Additionally, nmcli con show devicename focuses on showing connection profiles associated with the device rather than direct device information, which is why the first option is the most suitable for obtaining detailed network device information.