Upgrading UH VPN Server software is simple and is done via the apt package manager on Ubuntu. It is worth noting that this operation will restart all VPN servers in operation on the machine, having the effect of disconnecting all connected clients which will then subsequently reconnect after a period of around one minute.
The first step is to update the package archives:
sudo apt-get update
To upgrade just UH VPN Server software issue the command:
sudo apt-get install uh-vpn-server
This will install any updates for the uh-vpn-server service or alert you if you are already on the latest version.
Alternatively, UH VPN Server software is also upgradeable via the command:
sudo apt-get upgrade
However, doing so upgrades other packages already installed on the system.