OpenVoucher is designed for Debian. However, it is possible to install OpenVoucher on any popular Linux distribution. This might need modifications done by you – at the moment we only support Debian.
There are multiple ways of installation. You can install OpenVoucher from the sources by yourself, or you can download the virtual appliance that contains a preinstalled version of OpenVoucher (probably the easiest way).
For a setup from the sources, I assume that you just have installed a fresh Debian that runs nothing than a SSH server (of course it’s no problem if there are already some services installed on the machine).