Remove another Linux OS

I’m a Fedora newb. I’ve been using Ubuntu for the last 8 years. I recently got a new laptop and installed Ubuntu 20.04 on it. It was pretty buggy on my hardware, so I started looking into other OSes. I’ve been dual booting Ubuntu and Fedora to try it out and it’s been smooth. I’m ready to wipe Ubuntu from my laptop and leave Fedora as the only OS. The problem is that I have no idea how to safely do this. Any guidance is appreciated.


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We should probably gather some data to help assess the current state before providing advice.

Can we see the output of:

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No problem:

NAME                              SIZE TYPE FSTYPE      MOUNTPOINT                                 PTTYPE
loop0                            29.8M loop squashfs    /var/lib/snapd/snap/snapd/8140             
loop1                              55M loop squashfs    /var/lib/snapd/snap/core18/1754            
loop2                            65.3M loop squashfs    /var/lib/snapd/snap/p3x-onenote/74         
loop3                            62.1M loop squashfs    /var/lib/snapd/snap/gtk-common-themes/1506 
loop4                           161.4M loop squashfs    /var/lib/snapd/snap/gnome-3-28-1804/128    
nvme0n1                           477G disk                                                        gpt
├─nvme0n1p1                       512M part vfat        /boot/efi                                  gpt
├─nvme0n1p2                     284.1G part ext4                                                   gpt
├─nvme0n1p3                         1G part ext4        /boot                                      gpt
└─nvme0n1p4                     191.4G part LVM2_member                                            gpt
  ├─fedora_localhost--live-root    70G lvm  ext4        /                                          
  ├─fedora_localhost--live-swap   7.7G lvm  swap        [SWAP]                                     
  └─fedora_localhost--live-home 113.7G lvm  ext4        /home

OK, so it looks like you are running a UEFI system and your Ubuntu is in a single partition is at /dev/nvme0n1p2

First, you should always make sure you have good backups before doing anything like wiping out a partition.

Here is what I would do:

  • Clean up the the EFI partition. I believe ubuntu keeps these files at /boot/efi/EFI/ubuntu
  • Delete the Ubuntu partition by removing /dev/nvme0n1p2
  • Rebuild the grub config to remove the Ubuntu entry
  • Either leave the free space open something to be installed later or add it to fedora using lvm

Alternatively, you could just re-install.

As an unrelated side note, if you used the official AppImage for p3x-onenote, you wouldn’t need to have 5 snaps mounted.

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Thanks for the info, dalto! I just to make sure I understand everything before attempting this

  • I confirmed that Ubuntu keeps boot files in /boot/efi/EFI/ubuntu. I’m assuming that by “clean up”, you mean delete that directory: sudo rm -r /boot/efi/EFI/ubuntu

  • The second point is pretty clear. I’ll use gparted and delete that partition

  • Rebuild grub by running sudo grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg

  • I found a comment on another post and based on that, I’ll do the following 3 things to use the unallocated space

    1. Extend /dev/nvme0n1p4 using gparted
    2. Run sudo pvresize /dev/nvme0n1p4
    3. Run sudo lvextend -r -l +100%FREE /dev/fedora_localhost-live/home

Yes, I am hoping that, combined with removing the partition, is enough to stop grub from finding it.

I haven’t used in lvm in quite a few years so I can’t confirm or deny that you have the correct way to do it. :grin: