ubuntu wifi连接设置
1. 扫描可用的wifi网络
nmcli device wifi rescan 
nmcli device wifi list
2. 连接到wifi网络
nmcli device wifi connect "wifi_name" password "password" ifname 
nmcli device wifi rescan 
nmcli device wifi list
nmcli device wifi connect "wifi_name" password "password" ifname 
