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This question is an exact duplicate of:

My upgrade from Fedora 20 to 25 is long overdue. I have just received the DVD from the Linux shop, and have daily backups of my home directory and /etc made with fwbackups.

Where can I find a guide to the easiest way to do this, if possible without disturbing my data, email and other settings I have already?

marked as duplicate by Jeff Schaller, mattdm, Kusalananda, GAD3R, don_crissti Jan 2 '17 at 18:40

This question was marked as an exact duplicate of an existing question.

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Fedora doesn't have a DVD-based upgrade process; updates are started using fedup or dnf system-upgrade. We * test updates from the previous release and the release before that — so, from F23 or F24 to F25, but not from F20 to F25 directly.

Since you have data backed up, and the DVD in-hand, the easiest way may just be to do a fresh install of F25 and then put your information back. (I usually make /home a separate partition, to make this easier when I decide to do it.)

We do have some suggestions for upgrading from old releases — see Upgrading from End of Life releases on the Fedora wiki. The basic advice is to upgrade with yum to at least Fedora 21, and then dnf system-upgrade from there. You may have better results doing yum/dnf based upgrades all the way to F23 before doing dnf system-upgrade — or even going all the way to F25 that way.

The good news here is that we've worked to make dnf system-upgrade as painless as possible (often taking less than half an hour), so when your upgraded F25 system gets to end of life, going to F27 should be a piece of cake.


* I work on Fedora

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