===== Minimal Config =====

/etc/named.conf

<code>
options {
  directory "/var/cache/bind";
  dnssec-validation auto;
  listen-on-v6 { any; };

#  allow-query { any; };
#  allow-recursion { any; };
#  forwarders { 1.1.1.1; };
};

zone "example.local" {
  type master;
  file "/etc/bind/db.example_local";
};
</code>

db.example_local (in /var/named/___ if an absolute path is not used)

<code>
$TTL 50
@	IN SOA	ns1.example.local. ns2.example.local. (1 60 60 60 60)
	IN NS	ns1
	IN NS	ns2
ns1	IN A	127.0.0.1
ns2	IN A	127.0.0.1
</code>

The DNS spec needs 2 servers.
However, SOA is sometimes a nameserver followed by an email address (with "@" replaced by ".").

===== nslookup command =====

Examples

<code>
# Non-interactive
nslookup cnn.com
nslookup -querytype=A cnn.com 8.8.8.8
nslookup -querytype=CNAME www.cnn.com 8.8.8.8

# Interactive
nslookup
> set type=srv
> _mongodb._tcp.dev.pockettheories.com
</code>

===== Dig command =====

Examples

<code>
dig cnn.com
dig cname www.cnn.com @8.8.8.8
dig srv _mongodb._tcp.dev.pockettheories.com @mydns.pockettheories.com

# dig @ 
dig @8.8.8.8 cnn.com

# dig +short @  
dig +short @8.8.8.8 A cnn.com
dig +short @8.8.8.8 AAAA cnn.com
</code>