Erlang编程论坛：http://erlang.mysite.im
打开终端，依次输入以下内容
sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start
sudo gedit /etc/NetworkManager/nm-system-settings.conf
把 false 改成 true 保存 退出
sudo service network-manager restart