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I am trying to generate the file /boot/grub/grub.cfg using sudo grub-mkconfig -o /boot/grub/grub.cfg command, which gives me this error:

/usr/sbin/grub-probe: error: failed to get canonical path of "/cow".

It does not generate the file at all. Does anyone know how to solve this issue?

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Where do you entered this command at? I guess that you run that command on Live CD. –  xiaodongjie May 25 '14 at 7:33

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