I can't set wake on g in my nic at startup

[wonder]

I can solved with this:

1.- sudo nano /etc/init.d/wakeup.sh
2.- #!/bin/bash
ethtool -s eth0 wol g
3.-sudo chmod a+x /etc/init.d/wakeup.sh
4.-sudo update-rc.d wakeup.sh defaults

Note: eth0 = Name of the nic, in my case: enp4s0