By default, the Ubuntu installer has configured our system to get
its IP address and other network settings via DHCP. This is not what we
want so we have to change the server to have a static IP address. Edit /etc/network/interfaces and adjust it per your requirements. For this example we are using an IP address of 192.168.167.210 for this server.
Now,
there are a myriad of examples on the web and I am including a few
links to them for convenience sake in case they explain this better.
(they probably do) ;o)