Remove Ubuntu GRUB and use Fedora's one

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1

I recently removed Ubuntu from my system and installed Fedora 35 KDE spin. I want to get rid of Ubuntu GRUB since Ubuntu itself no longer exists on my system. I changed the boot order to boot Fedora GRUB first, but I want to completely remove Ubuntu’s one.
Output of lsblk in case it is needed:

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda           8:0    0 931.5G  0 disk 
└─sda1        8:1    0 931.5G  0 part /mnt/sda1
sr0          11:0    1  1024M  0 rom  
zram0       252:0    0   7.5G  0 disk [SWAP]
nvme0n1     259:0    0 232.9G  0 disk 
├─nvme0n1p1 259:1    0   512M  0 part /boot/efi
├─nvme0n1p2 259:2    0     1G  0 part /boot
├─nvme0n1p3 259:3    0 121.4G  0 part /home
└─nvme0n1p4 259:4    0   110G  0 part /

/dev/sda is my secondary HDD used for backups, it has no OS on it.

2

You did format that drive where you have ubuntu right still you can see ubuntu grub
Or you can see ububtu in fedora grub?

3

Basically what happened is deleting Ubuntu’s root partition then using that free space for Fedora.

4

okey hence you can see fedora grub right.
Okey remember most of the times it is not a big issue. So you don’t need to worry about a grub is a small file and don’t create any issues in system

Can you ls the /boot.

5

To get all the contents of /boot at once: Output of sudo tree -a /boot showed me possibly what I should delete:

├── efi
│   ├── EFI
│   │   ├── BOOT
│   │   │   ├── BOOTIA32.EFI
│   │   │   ├── BOOTX64.EFI
│   │   │   ├── fbia32.efi
│   │   │   ├── fbx64.efi
│   │   │   └── mmx64.efi
│   │   ├── fedora
│   │   │   ├── BOOTIA32.CSV
│   │   │   ├── BOOTX64.CSV
│   │   │   ├── gcdia32.efi
│   │   │   ├── gcdx64.efi
│   │   │   ├── grub.cfg
│   │   │   ├── grubia32.efi
│   │   │   ├── grubx64.efi
│   │   │   ├── mmia32.efi
│   │   │   ├── mmx64.efi
│   │   │   ├── shim.efi
│   │   │   ├── shimia32.efi
│   │   │   └── shimx64.efi
│   │   └── ubuntu
│   │       ├── BOOTX64.CSV
│   │       ├── grub.cfg
│   │       ├── grubx64.efi
│   │       ├── mmx64.efi
│   │       └── shimx64.efi

So I will sudo rm -rf /boot/efi/EFI/ubuntu
Edit: Ubuntu GRUB was successfully removed without bricking my system (at least from the UEFI entries), so I will mark this as the solution.

6

Where did you change that order? In the BIOS (UEFI, firmware, how is it called today)?

7

In the BIOS settings, which has also UEFI settings like boot order and such.

8

Good. Then you have to look at the UEFI boot entries.
What’s the result of this command?
sudo efibootmgr

9

The problem was actually solved, which is also reflected by sudo efibootmgr:

BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 2001,2002,0000,3000,2004
Boot0000* Fedora
Boot2001* EFI USB Device
Boot2002* EFI DVD/CDROM
Boot3000* Internal Hard Disk or Solid State Disk

Thanks for the help. If the solution I accepted is risky or not correct please correct me.

10

:thinking: In what way?

11

You can scroll up and check the solution. I basically used tree command to get all the contents of /boot. found a folder named ubuntu and deletd it.

12

Uh OK. I totally missed your previous post while I was replying :sweat_smile:

13

Nevermind, I appreciate everyone in here volunteering in their free time to help. So a big thanks :slight_smile:

1 Like
14

I don’t know if a more polite way could be this command
sudo efibootmgr -b <bootnum> -B
Where -b specifies the boot entry number and -B delete that boot entry.
Maybe under the hood such command delete the directory as you did by hand :slight_smile:

15

I don’t know about it, maybe it will just delete the efi entry and leave the ubuntu folder?
Thats probably safer than handling sudo rm -rf <anything>, it just takes a mistyped space to cause unintended damage.