关闭NetworkManager的作用
author: headsen chen
date: 2017-11-21 13:34:23
个人原创
重启网卡后，会造成网卡失效，报错如下：
Bringing up interface eth0: Error: Connection activation failed: Master connection not found or invalid
改正方法：
#service NetworkManager stop
#chkconfig NetworkManager off
#service network restart