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-probersudo 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-grubHow do I roll back to Ubuntu 22.04 from Ubuntu Noble Numbat?
