安装过程

1.设置NetworkManager自动启动

 chkconfig NetworkManager on

2.安装NetworkManager-wifi

yum -y install NetworkManager-wifi

3.开启WiFi

nmcli r wifi on

4.测试（扫描信号）

nmcli dev wifi

5.连接

nmcli dev wifi connect SSID password <password>

Troubleshoot

树莓派2代的centos7也可以，可能会报以下异常，重启下系统就好了

Connection activation failed :(7) Secrets were required,but not provided 

实在不行用下下面的：

#设置无线密码
nmcli connection modify SSID wifi-sec.key-mgmt wpa-psk
nmcli connection modify SSID wifi-sec.psk <WiFi密码>
#连接WiFi
nmcli connection up SSID