Listen for wakeonlan request

With nc you can listen on an udp port. The magic packet usually is sent to port 9 via broadcast. So, the command would be:

nc -ul 9

Depending on the nc implementation, you may also need to provide the -p flag:

nc -ul -p 9

To test it use the wakeonlan command...

wakeonlan <your-mac>

...and see in the nc terminal the output.