Download the virtualbox image from here.

In VirtualBox, select Import, then select the OVA file for the File field and click Next.

Confirm that you have a network adaptor enabled, then click Import.

When the OVA finishes importing, select the network adapter, then ensure it is set to Bridged Adapter and your host server's network card is selected.

Click Start to start the VM.

When prompted, enter a password for the Linux root user. It is important that you remember this password

If your installation does not detect an assigned IP address you can manually configure a static IP

After selecting the interface you want to use, you will then be prompted for the IP configuration details

You will be asked to select your IP address. If you are not sure which IP address is correct, we recommend selecting the first (IPv4) Local address

Once the installation is complete, a Server information window will display, providing you with a link to the management console. Access the link through your web browser to access the OPC.