1. 找 wifi 热点
sudo iwlist scan
2. 生成热点的配置(wpa2加密)
 sudo wpa_passphrase "wifi热点名称" "wpa密码" 
会生成这样格式的配置代码:
 network={ 
                        ssid="SSID_xxx" 
                        #psk="your_pass_here" 
                        psk=eb900177d2234487397b54f1fc1d6efc7f30e43b988ad21488ae3eb701a1g3b0 
                }
将这段代码添加到 /etc/wpa_supplicant/wpa_supplicant.conf 文件中:
                ctrl_interface=/var/run/wpa_supplicant 
                # ctrl_interface_group=wheel
        
                network={ 
                        ssid="SSID_xxx" 
                        #psk="your_pass_here" 
                        psk=eb900177d2234487397b54f1fc1d6efc7f30e43b988ad21488ae3eb701a1g3b0 
                }
        
        配置就完成了,下面添加启动代码
3. 在 /etc/rc.local 中添加相应的 wifi 启动代码:
                pkill wpa_supplicant 
                pkill dhclient
        
                ifconfig wlan0 down 
                ifconfig wlan0 up 
                iwconfig wlan0 essid "SSID_xxx" 
                wpa_supplicant -B -Dwext -iwlan0 -c/etc/wpa_supplicant/wpa_supplicant.conf
        
                dhclient wlan0
 现在重启系统,无线网络就会配置好了
原文:http://www.cnblogs.com/tomato2014/p/6057893.html