@György-Farkas / to all
Thank you all for support.
yes Gyorgy, you are completely correct; I did changed the sources on the /etc/opkg/distfeeds.conf by uncommenting the ones related with lede-project; however, I did this via ssh terminal on the phone and actually missed exactly the mipsel_24kc/packages
As a result, the attempt of trying to install etherwake package failed.
my next option was to enable all sources from the config file, just to be sure . . . .in the meantime I was also seeing your post and the proof that etherwake package can be installed.
Now, etherwake was installed only to find out that the actual command is not working . . . .;
It took me about 1-2 hours to figure out that this package seems to work only on the RJ45 connected port , which is not the case because I only have omega2+ and the PowerDock installed on the location so without a LAN connection;
Just by guessing and hoping that lede project will have similar packages implemented I've done:
opkg install wakeonlan
downloading packages and aftel install I was able to use:
(aka the MAC address) and the LAN PC was started via Wi-Fi, without the need of having a cable connected to the device.
PS: of course, that will be an issue when some power brakes are going to be experienced by the router and the Wi-Fi connection will be messed up so for just in case I'm going to have the Ethernet expansion dock on my future setup.