in order to access internet from my mobile device from an ethernet connection, what should i do?
If your mobile device is a PinePhone, get the “convergence dock” and connect it.
If your phone supports OTG: connect an otg cable, then connect an usb to lan adapter and lastly just plug the lan cable into the adapter and you should have access to the www.
Gnirehtet has worked well for me. You’ll have to go through a pc that is connected via ethernet and then share that connection with your phone via USB.