Tecadmin published a guide about installing OpenVPN Client on Ubuntu Linux.

How to Install & Connect OpenVPN Client on Ubuntu

Assuming one of your client want to secure connection to their server. The client has configured OpenVPN server on their network and provided you client configuration file. In that case you only need to install OpenVPN client application to your system and connect to remote vpn network. This tutorial will help you to install OpenVPN.

How to Install & Connect OpenVPN Client on Ubuntu