Click on the Ubuntu icon and enter the text terminal. Launch Terminal.
Install GUI package to connect to OpenVPN server with the following command:
sudo apt-get install network-manager-openvpn-gnome
Enter the password of the Ubuntu account to confirm the installation program.
In the Subscriptions download OpenVPN configuration files for Linux. And unpack the Zip file on your Desktop.
Click Edit Connections.
Click the Add button.
Select from the list - Import a saved VPN configuration.
Select OpenVPN configuration file.
The following information look under Subscriptions.
OpenVPN connection is successfully created.
Connect to the OpenVPN server on Ubuntu.
You have successfully connected to OpenVPN server.