//安装网络套件

apt install net-tools

//编辑interfaces文件添加代码

nano /etc/network/interfaces

//添加一个子网路由

up route add -net 192.168.100.0 netmask 255.255.255.0 gw 192.168.0.254
down route del -net 192.168.100.0 netmask 255.255.255.0 gw 192.168.0.254

//添加一个主机路由

up route add -host 192.168.100.100 gw 192.168.0.254
down route del -host 192.168.100.100 gw 192.168.0.254