Grub message: "no root file system"

Created by delance
Keywords:
grub boot root file system
Last updated by:
delance

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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