Network-Manager

nmcli

nmcli connection up VPN
nmcli connection down VPN

List available Wi-fi networks:

nmcli dev wifi

Python lib

• python-networkmanager

Hooks / NetworkManager-dispatcher

• Arch wiki: Network services with NetworkManager dispatcher

Ensure the service is running:

systemctl status NetworkManager-dispatcher.service

Captive portals

• Arch wiki: NetworkManager/Captive portals
• Automated Login For Captive Portals in Linux