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Oops! Here's what to do: Boot a live distro. This can be your Ubuntu installation disc or another one such as Knoppix. Find the drive/partition where you have installed your root filesystem. To do this you can open a terminal and run either sudo parted -l or sudo fdisk -l. If you can't tell, then edit your question and add the output. Assuming that your ...


3

This is not going to be straightforward so bear with me. I cannot give you specific instructions as each system is a bit different but here are the major steps you need to do to fix your issue. The first thing you need to do is boot the system from a live medium. Any Linux distro should work as long as it has the same architecture of the installed distro. ...


3

Hmm ... apparently this line was the clue: grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet.. Previously I had installed btrfs directly on /dev/sda and /dev/sdb. That's why both of them had a FSTYPE and LABEL attached (as shown in lsblk). Solution: I have now wiped both /dev/sda and ...


2

you have to boot from live cd and type in terminal sudo update-initramfs -u;sudo update-grub; if the problem still exist you have to reinstall grub from the live cd terminal sudo mount /dev/sda5 /mnt; sudo GRUB-install --root-directory=/mnt/ /dev/sda; sudo update-grub;


1

You can probably fix this problem by reinstalling grub. You need to mount your existing root directory to /mnt and then arch-chroot /mnt. Then you can follow the instructions at GRUB- Arch Linux Wiki to reinstall grub. If you absolutely cannot get grub to work, you can always try a different bootloader.


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You can find the Answer here: http://unix.stackexchange.com/a/177647/83339 if you are already on Debian you can follow the steps without need to boot from live CD


1

The easy way is to install grub-customizer tool: sudo add-apt-repository ppa:danielrichter2007/grub-customizer sudo apt-get update sudo apt-get install grub-customizer When Grub Customizer starts up, you’ll see a list of all the items that show up in the boot menu. To hide entries that you don’t want to see anymore, simply uncheck the checkbox next to ...


1

So you probably overwrote the beginning of your hard drive, I guess you're lucky anything it booting from it. I'd expect it's written it's own partition & maybe even MBR/GPT. Using a good live cd/dvd/usb should let you delete the new unwanted partition(s) and attempt to fix things, but restoring the overwritten data from a backup may be required. When ...



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