在命令行运行以下3个命令，即可重新启动网卡。
1.sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start 在命令行运行以下3个命令，即可重新启动网卡。
1.sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start ![工作环境换成Ubuntu18.04小记Ubuntu 18.04 最小安装后：[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)