虚拟机Ubuntu20.04 网络连接器图标开机不显示怎么办
执行以下指令：
sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start
执行以下指令：
sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start