Re: Destroyed Entries at /dev/sda - boot not possible anymore

[Y.]

Le 2015-03-30 14:48, Stefan Lamby a écrit :
> Also I am not sure, what "ubuntu" means in this case: Both are ubuntu - 
> one at
> the stick, the other on the hd. How can
> I find out which one is the correct synonym for the installation I like 
> to start
> into?  Could grub_uefi also be what I want? How to figure out?

I have zero experience with EFI. However, as far as I know, each OS 
writes to the EFI partition in a directory named /efi/<distribution>.
If you have twice installed Ubuntu, into different partitions, then the 
second installation probably has overwriten the /efi/ubuntu contents.
Thus, my advice would be to boot a live/usb Linux OS, then chroot to 
your on-disk Ubuntu (with its /boot mounted), and finally reinstall the 
boot-loader from there.

Yves.