- see all the interfaces:
ip link show
- set an interface up/down:
ip link set dev <interface name> up/down
- show all interfaces with IP addresses:
ip address show
- show only interfaces which have an IPv4 address:
ip -4 address show
- list all the current routes:
ip route show
- list all the current tunnels:
ip tunnel show
- show all neighbours:
ip neigh show