1. Open terminal (keyboard shortcut: Ctrl + Alt + T). 2. Install OpenVPN client by entering sudo apt-get install openvpn (if you are requested a password, enter the password which you have used when creating your account). 3. Navigate to OpenVPN configuration directory with command cd /etc/openvpn. 4. Download OpenVPN configuration files with command sudo wget nordvpn.com/api/files/zip. 4.1. In case you will get ERROR: The certificate of nordvpn.com is not trusted, please install ca-certificates package with command apt-get install ca-certificates. 5. If you do not have `unzip` package installed, download it by typing in sudo apt-get install unzip. 6. Extract config.zip with command sudo unzip zip. 7. Remove files which will be no longer used: sudo rm zip. 8. To see the list of all available servers, simply enter ls -al command and it will print full configuration file list. 9. Choose a server which you would like to connect to. 10. Start OpenVPN with a chosen configuration by entering sudo openvpn [file name] (for example: sudo openvpn at1.nordvpn.com.udp1194.ovpn). 11. OpenVPN will ask you for credentials, so simply enter those in with your NordVPN account credentials. 12. You have successfully connected to VPN. To disconnect from the OpenVPN connection simply open terminal and press Ctrl + C on your keyboard.