I currently have Ubuntu installed on one partition and my personal files (Pictures, Documents, etc.) on a second partition. I would like to install KDE Neon in the partition containing Ubuntu, while keeping the personal files partition.
I have yet to install Neon, but I have used a bootable USB.
The problem I've run into is that I don't know how to transfer ownership of files from an account on one installation to an account on another. If I were transferring files between accounts on the same OS, I would just use chown and be done with it, but I don't know how to do that across OSes.
I realize that I could set the permissions so that others have read access and then copy all of my files using the Neon account, but that would take hours due to how many files I have. I would rather use chown or something similar.