How do I update Grub2 when I can't boot into linux at all?

[Nils Kassube]

James R McKenzie wrote:
> I tried to install KDE 4.10.? (what ever the latest version is) Ubuntu
> 13.04 64 bit and can't boot into it at all. The short answer as to
> why I want KDE is I detest Mate, Cinnamon and all the other Gnome 3
> desktops. How do I remove it (Ubuntu 13.04) from GRUB2 and boot Linux
> Mint 14 by default. I tried to download & install Grub Doctor but
> came up with dependency issues, ie it won't install.

If you can't boot any more, check out this page:
<https://help.ubuntu.com/community/Boot-Repair>


Nils