ubuntu dns 解析失败

由于最近切换过几回网络，致使虚拟机ubuntu打不开网页，

首先测试了能够ping通外网ip，肯定是DNS解析的问题，上网查到以下解决方法。验证有效。

 

> sudo vim /etc/resolv.conf

nameserver 223.5.5.5
nameserver 114.114.114.114
nameserver 8.8.8.8
nameserver 10.1.30.1

> sudo /etc/init.d/networking restart
[ ok ] Restarting networking (via systemctl): networking.service