You can use Ubuntu configuration files from https://www.cactusvpn.com/downloads/ to setup OpenVPN.
How to setup OpenVPN client for CactusVPN:
- Update configuration files.
- Start OpenVPN as
/etc/init.d/openvpn start
or make it start at boot as/etc/init.d/openvpn enable
.
You can also start OpenVPN client manually as follows: