"The place for bind9 configuration files can differ a little
between Linux distributions. On Ubuntu servers they are located in
/etc/bind with the zonefiles placed under /etc/bind/zones .
"The standard install of bind9 on Ubuntu server is to act as a
caching DNS. But for this to work, you need to tell it where to
look for an adress that it can not resolve locally. So you need to
edit a file called named.conf.options."