I'm a sysadmin beginner so bear with me. We got delivered a Fujitsu Primergy RX300 S4 rack server and we need to install Ubuntu LTS 14.04.3 on it. The supported OS have not listed Ubuntu or Debian - is it still possible to install it or do we have to order a S5/S6 version according to Fujitsu?
If it is not listed in the supported OS list, then there are reasons behind it and you should think twice before installing it, even if it is possible. Because, in such a case, may be you won't get any OS support contract or patch/update for the OS.
If you understand the consequences and want to go ahead, I guess there are materials available online.
A quick google search reveals, only the following models are supported (fujitsu official site):