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I installed ubuntu to get access to a windows 7 install that was not working. I got it fixed, but now I cannot get back to ubuntu. I always starts in windows.

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GRUB is the program that loads Ubuntu (or a menu letting you select which OS to load). To install it, look at the answer to this question:

Installing Grub

There are things can go wrong with that answer, so feel free to comment on this answer and I will try to work with you. First thing to post would be the output of the command fdisk -l and the command ls -l /dev/disk/by-uuid (which you type at a command line shell -- press CTRL+SHIFT+T). You can edit your question with this information and use four spaces to indent shell output

like this

Welcome to Ubuntu, I hope you like it here.

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