Add route to specific network:
route add -net 1.2.3.0 netmask 255.255.255.0 dev eth0
Add default gateway:
route add default gw 1.2.3.4 eth0
Add route to specific network:
route add -net 1.2.3.0 netmask 255.255.255.0 dev eth0
Add default gateway:
route add default gw 1.2.3.4 eth0