If you’ve added an interface on ubuntu and wondered what interfaces you have on the system, you need to use the following to find out:

ls /sys/class/net

This will list the interface names for all NICs on your computer. It will probably include eth0 or enps160 (hardwired NIC), lo (loopback interface for the localhost), and something for your wireless card (like wifi0, or wlan0).

Find Network Interface Card Ubuntu
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