Erlang編程論壇：http://erlang.mysite.im
打開終端，依次輸入以下內容
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