Arg.. I updated /etc/resolv.conf and later after a reboot or restarting my network services NetworkManager pulls out my updates. So to stop this here is what have found works for me.
- Update /etc/resolv.conf as I wish
- edit NewtworkManager.conf
sudo vi /etc/NetworkManager/NetworkManager.conf
- add dns=none under [main]
- restart NetworkManager to ensure my /etc/resolv.conf is left alone
- Wonder why I didn’t sort this out sooner 🙂