centos ubuntu 连接wifi
ubuntu 没有nmcli安装sudo apt-get install nmcli
sudo dhclient -r //release ip 释放IP
sudo dhclient //获取IP
编辑文件/etc/network/interfaces：
sudo vi /etc/network/interfaces
并用下面的行来替换有关eth0的行：
# The primary network interface - use DHCP to find our address
auto eth0
iface eth0 inet dhcp
sudo /etc/init.d/networking restart 重启网卡
nmcli r wifi on 开启wifi
nmcli dev wifi 扫描附近wifi
nmcli --ask dev wifi connect [SSID] 连接wifi, 执行后输入密码.