nslookup-查询域名的A记录

$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 108.61.10.10

$ nslookup time.geekbang.org
# 域名服务器及端口信息
Server:    114.114.114.114
Address:  114.114.114.114#53 # 域名服务器一般监听在端口 53 上。

# 非权威查询结果
Non-authoritative answer:
Name:  time.geekbang.org
Address: 39.106.233.17