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Restoring access to Fedora after Ubuntu upgrade

I have a quadroboot OS installation environment in my primary laptop.

  • Ubuntu (primary OS)
  • Kali
  • Fedora
  • Windows 7

I decided to upgrade my Ubuntu installing to the latest 15.04. As soon the upgrade completed and rebooted, I noticed the GRUB menu was no longer displaying my Fedora 21 environment. The problem was because I had installed Fedora under an LVM partition, while the others weren't.

Restoring boot access to Fedora was fairly simple.

First, I had install lvm2 package in Ubuntu so it's able to view and configure the LVM

[email protected]:~$ sudo apt-get install lvm2

Then I had to activate the Volume Group.

[email protected]:~$ sudo vgchange -a y

After updating the Volume Group, I was able to verify that Ubuntu was able to my Fedora 21 install.

[email protected]:~$ sudo os-prober
/dev/sda1:Windows 7 (loader):Windows:chain
/dev/sda6:Debian GNU/Linux (Kali Linux 1.0):Debian:linux
/dev/mapper/fedora-root:Fedora release 21 (Twenty One):Fedora:linux

So the last step was to generate a new grub config.

[email protected]:~$ sudo grub-mkconfig > /boot/grub/grub.cfg

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