1、删除NetworkManager缓存文件
service NetworkManager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
service NetworkManager start
2、修改/etc/NetworkManager/NetworkManager.conf
managed=true
3、重启NetworkManager
sudo service network-manager restart
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原文链接:https://blog.csdn.net/qinliaoliao/article/details/86505139