https://blog.csdn.net/wzj_whut/article/details/86744485
https://blog.csdn.net/qwer790111/article/details/8614724
https://www.cnblogs.com/yuxc/archive/2012/07/29/2613974.html
sudo service NetworkManager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service NetworkManager start