arm开发板网络配置命令

ifconfig eth0 172.19.72.89 netmask 255.255.255.0 up  //配置IP地址
ifconfig eth0 up | down                                              //激活，关闭设备eth0

route add default gw  172.19.72.1                            //配置默认网关

暂时配置dns解析
echo "nameserver 61.128.128.68">> /etc/resolv.conf