1）查看NetworkManager服务是否启动
ps aux |grep NetworkManager
使用service NetworkManager start 命令启动该网络管理程序
2) 一般默认情况下该程序是启动的，我将 NetworkManager重启之后发现网络正常了
Connection activation failed Device not managed by NetworkManager,布布扣,bubuko.com
Connection activation failed Device not managed by NetworkManager
原文：http://www.cnblogs.com/any91/p/3896536.html