Ubuntu doesn't boot after Windows 7 installation?

Question

I installed Ubuntu 12.10 64 bit on my hard drive, then decided to install Windows 7 alongside on a 25 gb partition. I shrank my Ubuntu install by about 25 gb with a GParted Live USB. Ubuntu booted correctly after the shrink. I shut down and installed Windows 7 on the 25 gb partition. Now Windows 7 boots, and Ubuntu doesn't. Did I overwrite my MBR? If so, how do I fix it?

Possible duplicate of How can I repair grub? (How to get Ubuntu back after installing Windows?) — David Foerster, Apr 24 '16 at 14:54

MathCubes · Accepted Answer · 2013-04-26T16:10:02.930

3

Use EasyBCD to edit the Microsoft boot manager, too add ubuntu on to it. Then boot up Ubuntu and install Boot-Repair and reinstall grub and that should take care of it and set the default boot manager back to grub.

Boot-Rair

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get
update sudo apt-get install -y boot-repair && (sudo boot-repair &)

From "https://help.ubuntu.com/community/Boot-Repair"

Just post a comment if you just need me to go into more detail on this.

edited Apr 26 '13 at 16:10

answered Apr 26 '13 at 02:40

MathCubes

5,666

Thanks. I've used easybcd in the past, and I never thought of that. Thanks :D – 16trohrt Apr 26 '13 at 02:43
1

Once you have booted into Ubuntu, run sudo update-grub and then sudo grub-install /dev/sdX where sdX is the drive, where you want to install grub. – grimpitch Apr 26 '13 at 02:44
I'm pretty sure that grub is installed. I'm just trying to recover my Ubuntu partition. I primarily use Ubuntu, I just need Windows for iTunes :) – 16trohrt Apr 26 '13 at 02:47
1

The windows install has overwritten the MBR, grub-install writes back grub to the MBR. – grimpitch Apr 26 '13 at 02:50
The way that I answer is the way that I fixed for myself there maybe a more easier way that I don't know about since I don't use Windows Now. – MathCubes Apr 26 '13 at 02:51
How am I supposed to install grub if I can't boot into Ubuntu? – 16trohrt Apr 26 '13 at 02:52
1

You need to create a live CD or a bootable USB drive, I like to use the rescue mode in the debian installer in such cases. – grimpitch Apr 26 '13 at 02:56
The easyBCD method worked great. – 16trohrt Apr 26 '13 at 02:58
How do I rewrite my MBR so grub boots before easybcd? – 16trohrt Apr 26 '13 at 02:58
1

See my comment above, Once you have booted into Ubuntu.... – grimpitch Apr 26 '13 at 03:00

Ubuntu doesn't boot after Windows 7 installation?

1 Answers1