I'm trying to add a second dns server to my main server. How do I install a second dns server? I'm using ubuntu 15.10. server1.example.com is done by: https://www.howtoforge.com/tutorial...pureftpd-bind-postfix-doveot-and-ispconfig/3/ server1.example.com 192.168.1.101 server2.example.com 192.168.1.102
