In the previous control panels, and my previous linux experience, we’ve always used BIND for name services, and when you needed to restart or reload the name servers, you simply ran
service named restart
or
/etc/init.d/named restart
InterWorx uses djbdns rather than BIND. You don’t need to restart it, you just need to wait at most 5 minutes for DNS changes to be exported. You can restart it if you like via “service djbdns restart”.
There are no zone files, all your DNS editing is done via the NodeWorx DNS interface The DNS data is stored in a database by InterWorx, and exported every 5 minutes to the data file djbdns reads, /var/djbdns/tinydns/root/data.cdb (not a text file).