nslookup 查询MX和NS等

yu$ nslookup
> set TYPE=A
> www.google.com
Server: 219.233.241.166
Address: 219.233.241.166#53

Non-authoritative answer:
www.google.com canonical name = www.l.google.com.
www.l.google.com canonical name = www-china.l.google.com.
Name: www-china.l.google.com
Address: 64.233.189.104
> set TYPE=MX
> www.gmail.com
Server: 219.233.241.166
Address: 219.233.241.166#53

Non-authoritative answer:
www.gmail.com canonical name = mail.google.com.
mail.google.com canonical name = googlemail.l.google.com.

Authoritative answers can be found from:
l.google.com
origin = d.l.google.com
mail addr = dns-admin.google.com
serial = 1309884
refresh = 900
retry = 900
expire = 1800
minimum = 60
> set TYPE=NS
> www.google.com
Server: 219.233.241.166
Address: 219.233.241.166#53

Non-authoritative answer:
www.google.com canonical name = www.l.google.com.
www.l.google.com canonical name = www-china.l.google.com.

Authoritative answers can be found from:
l.google.com
origin = b.l.google.com
mail addr = dns-admin.google.com
serial = 1309885
refresh = 900
retry = 900
expire = 1800
minimum = 60
> exit