route — Show / Manipulate the IP routing table.
Route manipulates the kernel’s IP routing tables. Its primary use is to set up static routes to specific hosts or networks via a network interface (like eth0 …).
$ route — Show routing table. It will try resolve the name for IP.
$ route -n — Same as above. But won’t resolve.
$ route -ee — Show more detailed info.
$ route -A inet6 — Show IPv6 related route info.
# route add -net 127.0.0.0 — Adds the normal loopback entry.
# route add -net 192.168.14.0 netmask 255.255.255.0 dev eth0 — Adds a route to the network 192.168.14.x via “eth0”.
# route add default gw midas-gw dev eth1 — Set the default Gateway for eth1.
# route del default dev eth0 — Remove the default Gateway of eth0.
# route add -net 10.0.0.0 netmask 255.0.0.0 reject — Sets rejecting route for the “10.x.x.x.”
# route add -net 192.168.13.0 netmask 255.255.255.0 gw wify1 — Adds the net “192.168.13.x” to be gatewayed through wify1.
Read: man route