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I have seen users reports where users assumed that downloading a new ISO and running anaconda was the way to upgrade. We can do some things better on the website and in our documentation to avoid that, but I think it is still likely to happen. If Anaconda detects an existing Fedora installation, it should present a note explaining that Anaconda doesn't do upgrades, but that upgrades are supported through fedup/dnf system-upgrade.
As an alternate approach (I can file a separate BZ if preferred), Anaconda could regain the ability to perform upgrades by enabling the user to run a copy of `dnf system-upgrade download` in the /mnt/sysimage and then tell the user to reboot to apply the changes (assuming of course that there is a valid network connection).
(In reply to Stephen Gallagher from comment #1) > As an alternate approach (I can file a separate BZ if preferred), Anaconda > could regain the ability to perform upgrades by enabling the user to run a > copy of `dnf system-upgrade download` in the /mnt/sysimage and then tell the > user to reboot to apply the changes (assuming of course that there is a > valid network connection). Please do not make this (the ability to perform upgrades by enabling the user to run a copy of `dnf system-upgrade download` through Anaconda) as default, even if there is a valid network connection, due to network bandwidth availability constraints and issues related to network usage levels in most of the developing countries
(In reply to Rejy M Cyriac from comment #2) > (In reply to Stephen Gallagher from comment #1) > > As an alternate approach (I can file a separate BZ if preferred), Anaconda > > could regain the ability to perform upgrades by enabling the user to run a > > copy of `dnf system-upgrade download` in the /mnt/sysimage and then tell the > > user to reboot to apply the changes (assuming of course that there is a > > valid network connection). > > Please do not make this (the ability to perform upgrades by enabling the > user to run a copy of `dnf system-upgrade download` through Anaconda) as > default, even if there is a valid network connection, due to network > bandwidth availability constraints and issues related to network usage > levels in most of the developing countries Just to be clear, I'm suggesting this as a user-selectable choice, not an automatic action by any stretch of the imagination. I meant that if (as Matthew suggested) Anaconda could detect an existing Fedora system on the hard drive that it could offer to optionally perform an upgrade instead of a reinstall (and then walk the user through any necessary network setup).