Shutdown & Poweroff Lubuntu
With the stock setting, the network interface stays powered on after a shutdown/poweroff (certainly in order to make a wake-on-lan possible) - LED are lighting.
$ sudo nano /etc/default/grub ... GRUB_CMDLINE_LINUX_DEFAULT="splash quiet noacpi" ...
$ sudo ethtool eno1 // for interface "eno1". Should give... ... Wake-on: d ....
If “Wake-on: g” for exemple:
$ sudo ethtool -s eno1 wol d