Ubuntu Minimal 18.04 Upgrade to 20.01 ?

[rockla]

How to upgrade without losing anything ?

[mad_ady]

First of all, do a full backup (either with dd, odroid-backup, or some other method).
Next, run sudo apt-get dist-upgrade and reboot. And try sudo do-release-upgrade. It will disable 3rd party repos, likw hardkernel's, so aftwr upgrade you'll need to reenable it and do apt-get dist-upgrade once more.
If it complains about python2, search the net - it's a common problem.

[rockla]

First of all, do a full backup (either with dd, odroid-backup, or some other method).
Next, run sudo apt-get dist-upgrade and reboot. And try sudo do-release-upgrade. It will disable 3rd party repos, likw hardkernel's, so aftwr upgrade you'll need to reenable it and do apt-get dist-upgrade once more.
If it complains about python2, search the net - it's a common problem.

What exactly would be disabled i have backed my sources.list though i see it is creating backp with distUpgrade as file ? What do i need to revert ?

[mad_ady]

After you run do-release-upgrade it will calculate what needs to be done and then it will tell you (if there are no issues) what packages will be uninstalled, what is new and what is to be upgraded. You can safely abort the upgrade at this step if you want to.

[rockla]

I went with upgrade everything worked well.