ubuntu安装kvm，安装fusion computer 不能联网，修改如下

sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start
sudo gedit /etc/NetworkManager/NetworkManager.conf
（把false改成true）
sudo service network-manager restart

摘自：https://blog.csdn.net/limanjihe/article/details/128211944