查看4G板网络指令：
ifconfig

4G板升级指令：直接复制以下指令到终端中复制粘贴即可；(需要在4G板网络正常的前提下)

route add -net 218.205.210.215 netmask 255.255.255.255 dev ppp0
rm /tmp/dgm_upgrade.gz
cd /tmp
wget http://218.205.210.215:6001/yidongtaiping/dgm_upgrade.gz
dgm_upgrade 1>/dev/null 2>&1
cat /etc/config/master_version
killall dgm_ser