/etc/resolv.conf裏面設置的nameserver就被清空

# 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       注意看：

 

1 /etc/resolv.conf 實際上是一個Link

它其實指向的是 /run/resolvconf/resolv.conf 

 

3 若是想本身定義 nameserver，那麼有如下2個辦法：

A 在網卡的配置文件/etc/network/interfaces 裏面加：

dns-nameservers 192.168.3.45 192.168.8.10

dns-search foo.org bar.com 

重啓網絡

 

sudo service networking restart 
或者
sudo /etc/init.d/networking restart

也能夠重啓網卡

sudo ifconfig eth0 down sudo ifconfig eth0 up

 

 

B 修改 resolvconf服務的配置文件: /etc/resolvconf/resolv.conf.d/base 

echo "search test.com" >> /etc/resolvconf/resolv.conf.d/base 

echo "nameserver 202.106.0.20 " >> /etc/resolvconf/resolv.conf.d/base 

這樣，在機器重啓或 resolvconf 服務重啓 均可以保證配置會寫到/etc/resolv.conf 裏面 

重啓 resolvconf 服務

service resolvconf restart

A比B的優先級更高,,不過可能會斷網.

摘至：http://blog.csdn.net/liangdsh/article/details/70256039