九 . 树莓派A20 网络配置

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1 有线和无线的配置

在树莓派A20的/etc/network/interfaces下，网络配置设置为：

auto lo eth0
iface lo inet loopback
iface eth0 inet dhcp

#"your-ssid-here" and "your-passwd-here" should been replase with yours and remove the annotation
#auto wlan0
#iface wlan0 inet dhcp
#pre-up ip link set wlan0 up
#pre-up iwconfig wlan0 essid your-ssid-here
#wpa-ssid your-ssid-here
#wpa-psk your-passwd-here

auto wlan1
iface wlan1 inet dhcp
pre-up ip link set wlan1 up
pre-up iwconfig wlan1 essid 1902
wpa-ssid 1902
wpa-psk nanjingqingjin

如果只使用eth0并且ip地址为192.168.25.15，我们可以这么配置：

auto eth0
iface eth0 inet static 
address 192.168.25.15
gateway 192.168.25.1 
netmask 255.255.255.0