You will need to install some additional packages to your Debian/Ubuntu operation system in order to connect through OpenVpn.
sudo apt-get install openvpn network-manager-openvpn network-manager-openvpn-gnome
Open the network menu, go to "VPN Connections" and click on "Configure VPN...".
Click on "Add".
Click on "Import a saved VPN configuration...".
Click on "Create".
Download the OpenVPN configuration unzip it and import the ".ovpn" configuration files.
Enter your username and passwordStep 7
Enter your login credentials and click on "Save...".
Open the network menu to establish a VPN connection.