sudo nano example.com.zone

example.com. 84600    IN   SOA    ns1.example.com.  hostmaster.example.com. (
    2013062901    ; serial
    21600         ; refresh (6 hours)
    900           ; retry  (15 minutes)
    604800        ; expire (1 week)
    3600          ; minimum (1 hour)
    )
                  NS  ns1.example.com
                  NS  ns2.example.com
                  MX  10 mail.example.com
ns1               A  192.168.1.10
ns2               A  192.168.1.11
mail              A  192.168.1.13
www               A  192.168.1.14