Comment 3 for bug 1668685

Sorry for missing your request, costales.
I have upgraded to Ubuntu 17.04 since posting this bug.

Here is what you were looking for:

$ ls /sys/calss/net/*
ls: cannot access '/sys/calss/net/*': No such file or directory

And then

$ basename -a /sys/class/net/*
enp0s31f4
lo
wlp3s1