Grub message: "no root file system"

Created by delance on on 2011-06-21
Keywords:
grub boot root file system
Last updated by:
delance on on 2011-07-13

This error message means that Grub has found boot partition, but can't launch Linux with the files found.
The first step is to reinstall Grub from CD or USB stick: https://help.ubuntu.com/community/Grub2#Reinstalling%20GRUB2
If it fails again and error occurred after an update of system (specially a new kernel), try to boot from 3rd line of Grub menu, i.e. the previous kernel.
If it fails again, to get help on forum provide:
a-partition table: https://answers.launchpad.net/grub/+faq/1678
b-file /boot/grub/grub.cfg
c-result of command:
    ls -l /boot
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