So I had Ubuntu 20.04 installed on my PC. Then I installed Kubuntu 20.04 alongside my Ubuntu. But after reboot the GRUB menu was not updated at all. It’s like Kubuntu installation did not update my GRUB menu. I am using UEFI so maybe that is the problem? How do I add Kubuntu menu option to my GRUB now?
P.S. I tried Grub Customizer, but that did nothing.
>Solution :
I finally fixed it, so I will share this with anyone else who might run into the same problem.
Unfortunately, GRUB Customizer was no help to me. Even after I installed it to MBR and updated grub – it had no effect and my GRUB menu did not change at all.
Then I noticed that there was a partition mounted on /boot/efi like this
$ df -h
Filesystem Mounted on
/dev/sda1 /boot/efi
Then I created a new directory and mounted the /dev/sda1 partition there
$ sudo mkdir /mnt/bootefi
$ sudo mount /dev/sda1 /mnt/bootefi
And then installed GRUB on this new partition like this
$ sudo apt install grub-efi -y
$ sudo grub-install --efi-directory=/mnt/bootefi
After rebooting, finally my GRUB was updated and I saw my new Kubuntu entry!