如果不知道,可以用nslookup去找,像这样
[user@machine user]$ nslookup
Note: nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead. Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
> ns.bta.net.cn
Server: 192.168.1.1
Address: 192.168.1.1#53