The route command for Linux

1. View the routing table
Route-n

2. Add Default gateway
Route add default GW 113.200.114.225
Or
Route add-net 0.0.0.0 netmask 0.0.0.0 GW 113.200.114.225

3. Delete the default gateway
Route del default GW 113.200.114.225

Generally, multiple network segments communicate with each other, and a priority route needs to be established rather than through the default gateway.
3. Routes added to the 192.168.40.0/24 subnet
Route add-net 192.168.40.0 netmask 255.255.255.0 GW 192.168.0.254
Or
Route add-net 192.168.40.0/24 GW 192.168.0.254

Specify a device instead of an address
Route add-net 192.168.40.0 netmask 255.255.255.0 Dev eth0
Or
Route add-net 192.168.40.0/24 Dev eth0

4. Remove the route to the 192.168.40.0/24 subnet
Route del-net 192.168.40.0 netmask 255.255.255.0 Dev eth0
Or
Route del-net 192.168.40.0/24 Dev eth0

5. Host routing: How to configure a route to a host
Route add-host 192.168.2.13 Dev eth2

Add to Script
Vi/etc/sysconfig/static_routes