How to reinstall grub2 after upgrade?

[Georgios Petasis]

Hi all,

I have upgraded a pc from fedora 18 to 19, and I am left with an ugly 
grub2 boot loader.
So, I have removed packages grub2, grub2-tools, erased 
/etc/default/grub, re-installed them, and run:

|grub2-install /dev/sda
||grub2-mkconfig -o /boot/grub2/grub.cfg|

But grub still has no theme. Package grub2-starfield-theme is installed 
though.

When I reinstalled grub2-tools, no /etc/default/grub was created.
Is there a reason for that?
I am asking because I have found this: 
https://ask.fedoraproject.org/question/27617/solved-after-upgrade-to-fedora-19-grub-has-no-theme/

George
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