```bash #!/bin/env bash gw1=172.16.53.254 gw2=172.16.52.254 ##this is Automatic binding gateway scripts ####author xw 2018.3.27 while : do ip route del default ip route add default via $gw1 ##先删除默认，只在测试环境，生产中这条可忽略 while ping -c1 $gw1 &>/dev/null do sleep 5 done ip route del default ip route add default via $gw2 until ping -c1 $gw1 &>/dev/null do sleep 5 done done 使用watch -n5 ip route 可五秒查看 ```