When booting up Ubuntu 16.04, I'm getting this:
Press enter for maintenance( or type Control-D to continue)
and when pressing enter, I get this error:
sulogin cannot read /dev/tty1 permission denied
Make sure your
/etc/fstab is all correct and reboot. I would recommend commenting out all lines except the essential ones (by putting # at the beginning of the line) and trying to reboot. If it works, try uncommenting the lines one by one and rebooting between each try to see which lines is the problem.