[SOLVED] 16.04 64bit server. Can't set static address. Who ordered enp3so?

Hi All,

I decided to set up a Plex media server and as a first step sorted out a decent machine. Installed a newly downloaded version as shown above. Install flew in no problem. Set up root passwd. Then I wanted to set a static ip address. So edit /etc/network/interfaces. No eth0. Why wasn't I told about this. Tried to bluff my way to success by old way of setting static address but no good, update call gave me a load of errors but no update. I guess there is a new way of doing something that I didn't catch.
I can't find an answer on the net and I can't find an answer to an enquiry 'enp3so' in the forums.

Guidance on where we are now with this new (since my last server install of 14.04) way of doing things will be hugely appreciated.

best regards,

brawd.

OK found a couple of references on Youtube. I must say that they are all different to what I'm getting on my screen with my installation so obviously things are much too volatile for me to be successful with 16.04. In view of my weaknesses I'm going to mark this as solved though it isn't.

brawd.