It’s easy to find your internal IP address my using tools like ifconfig or ip a but to find your external IP address (the one that connects you to the outside world) you must use other means. Here are 3 simple commands that you can use to do just that:

$ curl ifcfg.me 72.76.yyy.xxx $ curl icanhazip.com 72.76.yyy.xxx $ nslookup myip.opendns.com. resolver1.opendns.com Server: resolver1.opendns.com Address: 208.67.222.222#53 Non-authoritative answer: Name: myip.opendns.com Address: 72.76.yyy.xxx