echo "Try"

for i in $(ip -o link show | awk -F': ' '{print $2}'); \
do mac=$(ethtool -P $i) \
&& printf '%-10s %-10s\n' "$i" "$mac"; \
done

echo "OR"

ls -l /sys/class/net/


echo "So, actual devices show in /sys/class/net. Note that aliases (like lan:0) do not (so you can tell which are aliases). "

echo "And you can clearly see which are actual hardware (lan) and which aren't (br0, lo, tun0)."