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Possible Duplicate:
Can't boot without Flash Drive plugged in

I installed Ubuntu 12.04 LTS in my Dell Inspiron 1545 from a usb stick but it is not booting up when I removed the usb from the computer. but it is working when I put the usb in my computer. I want ubuntu to start without the usb. Please can you help me? Thanks.

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marked as duplicate by fossfreedom Jun 20 '12 at 10:36

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

check my answer… – virpara Jun 20 '12 at 9:11

Sounds like grub has been installed to the usb. From your booted Ubuntu system, open a terminal, then use the following commands to install grub to the internal drive :

sudo grub-install /dev/sdX
sudo update-grub

Replacing sdX with the actual drive, which will probably be sda, but use disk utility to double check if you are unsure.

Accidently installed grub to usb

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Boot-repair is a good resource. If you're not using EFI sometimes Ubuntu installs an EFI grub loader (grub-common) your computer might only support bios boot loading which is grub-pc. – Randnum Jul 8 '12 at 18:03

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