ip route

IP Routing table management subcommand. More information: https://manned.org/ip-route.

• Display the routing table:
  ip route {{show|list}}
• Add a default route using gateway forwarding:
  sudo ip route add default via {{gateway_ip}}
• Add a default route using eth0:
  sudo ip route add default dev {{eth0}}
• Add a static route:
  sudo ip route add {{destination_ip}} via {{gateway_ip}} dev {{eth0}}
• Delete a static route:
  sudo ip route del {{destination_ip}} dev {{eth0}}
• Change or replace a static route:
  sudo ip route {{change|replace}} {{destination_ip}} via {{gateway_ip}} dev {{eth0}}
• Show which route will be used by the kernel to reach an IP address:
  ip route get {{destination_ip}}