vi resolv.conf

[root@主名名 ~]# vi resolv.conf
earch hosteaseservers.com
nameserver 8.8.8.8
nameserver 8.8.4.4

http://blog.csdn.net/wj120396192/article/details/9282603
https://zhidao.baidu.com/question/1051747975194593659.html

https://www.baidu.com/s?wd=yum%20install%20screen%20dns&pn=10&oq=yum%20install%20screen%20dns&ie=utf-8&usm=1&rsv_idx=1&rsv_pq=dc7e80030002985e&rsv_t=adcb8R9Xc6fwahQy%2FeGlPDHagAk68reoqK5Ux9EFTmQSmk0k%2BV7Z3R6vY%2FY&rsv_page=1

yum install screen dns

https://www.cnblogs.com/freeweb/p/5261077.html

http://blog.csdn.net/baple/article/details/44196263

http://blog.haohtml.com/archives/6203