If we get this error in Ubuntu while restarting network service.
Here /etc/resolv.conf is a file move it to /run/resolvconf/resolv.conf.
# sudo mv /etc/resolv.conf /run/resolvconf/resolv.conf
Then create the symlink using ln -s.
# sudo ln -s ../run/resolvconf/resolv.conf /etc/resolv.conf
Then restart the network service
# sudo /etc/init.d/networking restart
Or there is an Alternative way to reconfigure the network service by issuing following command.
# sudo dpkg-reconfigure resolvconf
This will be solution for the titled error.