# ip > Show/manipulate routing, devices, policy routing and tunnels. > Some subcommands such as `ip address` have their own usage documentation. > More information: . - List interfaces with detailed info: `ip address` - List interfaces with brief network layer info: `ip -brief address` - List interfaces with brief link layer info: `ip -brief link` - Display the routing table: `ip route` - Show neighbors (ARP table): `ip neighbour` - 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 a default route: `ip route add default via {{ip}} dev {{interface}}`