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I have a problem with Ubuntu 11.04. I've installed Ubuntu 11.04 from Windows, it worked fine for days, but today it won't boot.

When I start the machine, GRUB loads. There is the Windows 7 loader, I select Ubuntu from there and after that, I should see the Ubuntu GRUB menu, where I'd select the mode to boot Ubuntu. However, I can't see that any more. I directly get to a GRUB terminal.

Can anyone help me with this? How would I recover my data or reset the boot loader?

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what do you get in terminal ?? Can you paste the screenshot ? – sagarchalise Sep 26 '11 at 11:06
it is a terminal when i try to boot. How can I make a screen shot then. Anyway is empty. "GRUB>"; – Badea Sorin Sep 26 '11 at 12:06
seems like a fielsystem error you will need to boot from live usb and check your filesystem with a command fsck or from gparted or disk utility – sagarchalise Sep 26 '11 at 12:18
ok thanks. i'll try this – Badea Sorin Sep 26 '11 at 12:45
There should be some error message before the grub prompt. You can take a picture of the screen with a cell phone or camera and upload that to photobucket or something. – psusi Sep 26 '11 at 15:52
  1. Boot from LiveCD or USB.

  2. Parted Magic and Ubuntu Live CD specifically.

  3. Check if Ubuntu files are still there. If your Ubuntu partition is ok, maybe there's some problem with the Kernel. You may try to install a new one...

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