[root@backup-server ~]# nslookup baidu.com
    Server: 192.168.222.2
    Address: 192.168.222.2#53
    Non-authoritative answer:
    Name: baidu.com
    Address: 39.156.69.79
    Name: baidu.com
    Address: 220.181.38.148
    [root@backup-server ~]#