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I changed my laptop partition a little now it can't load the boot menu and showing error message every time i start my laptop. How do I fix this problem or rescue my data as I can access them with ubuntu live USB.

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And what does the error say...? – Uri Herrera Feb 25 '13 at 8:01

you must re install grub, the easiest way is to log in with a live usb disk of ubuntu , then mount your ubuntu partition lets say it is mounted at /media/ubuntu, then go to terminal and do:

sudo grub-install --boot-directory=/media/ubuntu sda

hope my syntax is correct ;)

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