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This article applies to Fedora Atomic Host (though there is also a Silverblue/Atomic Workstation). For "classic" Fedora Workstation and Server, see DNF system upgrade.

New: This article has been replaced by links to blog entries. See:

Upgrading from Fedora Atomic Host 28 to 29.

And Fedora Atomic Host 27 to 28.

And Fedora Atomic Host 26 to 27.