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When I installed Linux debian 2.6 and GRUB I managed to install it, the boot loader, on a usb flash drive. Right now, If the USB drive is plugged into the computer, the GRUB and the OS starts, otherwise, if the usb is out, nothing happens.

There are some grub files in /boot/grub/ and /usr/lib/grub/i386-pc/ but there's no e.g. menu.lst in these directories, but a lot of other files.

To be honest, I don't know if I actually installed GRUB on the flash drive or not, but I can't start the OS without having the Flash drive inserted.

Well, what I would like to do is to be able to start the OS without having the USB plugged-in.

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up vote 4 down vote accepted

While in the OS, try installing GRUB:

grub-install /dev/sdX

Where /dev/sdX is the HDD where the bootloder should be installed.

This will move GRUB to your disk and set it up as to boot without the need of the LiveUSB.

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GRUB must be instaled on a disk, not a partition. Try grub-install /dev/sda. – Marius Cotofana Sep 4 '12 at 15:12

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