Comment 2 for bug 1540568

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Martin Pitt (pitti) wrote : Re: package udev 228-4ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

https://launchpad.net/ubuntu/+source/init-system-helpers/1.26ubuntu1 broke update-rc.d for about half a day in Ubuntu. If you installed/upgraded during that time or with an image built in that time, you'd get an effect like this. Can you please run

   sudo update-rc.d mountkernfs.sh defaults
   sudo apt-get -f install

This should clean up after that error.