# ip > Show / manipulate routing, devices, policy routing and tunnels - List interfaces with detailed info `ip a` - Display the routing table `ip r` - Make an interface up/down `ip link set {{interface}} up/down` - Add/Delete an ip address to an interface `ip addr add/del {{ip}}/{{mask}} dev {{interface}}` - Add an default route `ip route add default via {{ip}} dev {{interface}}`