If there’s one kind of app where the GUI gets in the way of functionality, it’s a VPN interface. That’s why the command-line interface is my favorite way of launching and interacting with a VPN app. It’s always faster, and doesn’t take up any extra resources. I started using a command-line VPN about a year ago, and I have not gone back to the GUI for VPN since.
Source: Connecting to a VPN Service from the Linux Command Line
