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When i try to install grub 2 by the command

sudo grub-install --root-directory=/media/grub2 /dev/sda

I get the error: failed to get canonical path of '/cow'.

When I try to install grub by

sudo grub-install --root-directory=/mnt /dev/sda

message is: installation finished.no error reported.

Then when I run the command

sudo update-grub

I get the same error: failed to get canonical path of '/cow'.

I will give you brief why I was trying this.

I had old desktop with XP and Ubuntu 10.10.

I opened the system after 3 years. Everything was working. I thought to upgrade 10.10 to 14.04. made the bootable usb through 10.10. Now installation is crashing at the stage of file transfer. I have P4 system .. Hard disk is Sata( through convertor). My cd drive is old & only cd WR... Have external dvd drive but not booting the bootable dvd through usb. Now I am trying to install the Ubuntu 14.04 through Hard disk.

To do same I need to install grub 2..

I do not know much of Linux and coding... all this i have understood by Google.

Vaibhav Rohal
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1 Answers1

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You'll need to mount /mnt and /boot before:

After booting the live USB, mount the Ubuntu partition to /mnt with:

sudo mount /dev/sdaX /mnt

Replace X with your disk partition number

If you have a separate /boot partition, we'll need to mount it in /mnt/boot as well:

sudo mount /dev/sdaY /mnt/boot

Replace XYwith your /boot partition number

Now update grub with the correct root and target:

sudo grub-install --root-directory=/mnt /dev/sda
Maythux
  • 84,289