less than a minute
During the Live-USB AND after the installation you need to execute the following command:
sudo connmanctl services
This will help you in getting the ethernet_xxx string that you need for the following command:
sudo connmanctl config ethernet_4c38d511XXX2_cable --ipv4 manual 192.168.10.XX 255.255.255.0 192.168.10.XX --nameservers 8.8.8.8