Install and set up the VPN
Start a Terminal session.
In the Terminal, type the following commands.
To install OpenVPN, type
sudo apt-get install -y openvpn
Go to the folder where you have openvpn config file right click there and select open in terminal then select the open vpn file and choose rename and copy the full name (with .ovpn) and paste with sudo openvpn --config (config file name)