ifconfig or ip a (checking networking configuration)

Shows the system’s current network configuration. Can be used to check your IP configuration when you can’t connect to a network (other remedies include checking the ARP tables arp, pinging the default gateway, checking w/ the DNS via nslookup). On some devices, consider ip a

$ ifconfig
# loads of stuff

$ ip a
# stuff

The things to look out for are en0, lo0/loopback, and for wireless solutions (something that starts with like w, and has 0, or something)

Another alternative is tcpdump -D, it can show you the available interfaces for packet capture, aka checking your interfaces.

$ tcpdump -D
1.en0 [Up, Running, Wireless, Associated]
2.awdl0 [Up, Running, Wireless, Associated]
3.llw0 [Up, Running, Connection status unknown]
4.utun0 [Up, Running]
5.utun1 [Up, Running]
6.utun2 [Up, Running]
7.utun3 [Up, Running]
8.utun4 [Up, Running]
9.utun5 [Up, Running]
10.lo0 [Up, Running, Loopback]
11.anpi1 [Up, Running, Disconnected]
12.anpi0 [Up, Running, Disconnected]
13.en3 [Up, Running, Disconnected]
14.en4 [Up, Running, Disconnected]
15.en1 [Up, Running, Disconnected]
16.en2 [Up, Running, Disconnected]
17.bridge0 [Up, Running, Disconnected]
18.gif0 [none]
19.stf0 [none]
20.ap1

#networking #networking/commands