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I am new to Ubuntu and I was using jammy Ubuntu 22.04 and I tried to update Grub 2.6 to 2.12 in the process it got updated to OS Nobula Ubuntu 24.04

E: Conflicting values set for option Signed-By regarding source https://ppa.launchpadcontent.net/yannubuntu/boot-repair/ubuntu/ jammy: /etc/apt/keyrings/boot-repair.gpg != 
E: The list of sources could not be read.

These commands I used to update (I installed boot repair and selected recommended repair:

sudo apt-get install -y grub-efi os-prober
sudo apt-get purge --allow-remove-essential -y grub2-common:*  
sudo apt-get purge --allow-remove-essential -y grub-common:* 
sudo apt-get purge --allow-remove-essential -y shim-signed 
sudo apt-get purge --allow-remove-essential -y grub2-com* 
sudo apt-get purge --allow-remove-essential -y grub-com* 
sudo apt-get install -fy 
sudo dpkg --configure -a 
grub --version 
sudo update-grub

How do I roll back to Ubuntu 22.04 from Ubuntu Noble Numbat?

Ajay
  • 2,241
SUDARSAN
  • 7

1 Answers1

1

Ubuntu does not have a built-in "roll back" feature. The design of Debian-based systems makes that too difficult.

If you have backups of your complete 22.04 system, you may be able to restore your 22.04 system from them.

If you lack backups, then preserve your data and then reinstall 22.04. For most folks, a complete reinstall is a simple and fast process.

user535733
  • 68,493