Ok i've compiled terracoind ok no issues there.

It's in xubuntu@xubuntu~/terracoin/src/ (ie /home/xubuntu/terracoin/src/)

I now need to create .terracoin/terracoin.conf which fails due to permissions error when using 'nano' or 'cat'.
sudo nano /home/xubuntu/.terracoin/terracoin.conf (wont save)
sudo cat /home/xubuntu/.terracoin/terracoin.conf (wont create)

So where the hell is .terracoin as it's not the same dir as ~/terracoin