How do you do an upgrade? f39 to f40

the installer only knows fresh install.

Boot into F39
open a Terminal and enter the following commands:

sudo dnf upgrade --refresh


sudo dnf install dnf-plugin-system-upgrade ## only if you’d never upgraded before this way

sudo dnf system-upgrade download --releasever=40

sudo dnf system-upgrade download --releasever=40 --allowerasing ## only if previous command didn’t work properly

sudo dnf system-upgrade reboot

That’s my way to upgrade - did it since F30 and worked for me all the time.

See also: Upgrading Fedora Linux to a New Release :: Fedora Docs


got it!

Probably there will be some delay before the upgrade process is offered to the users through the Software Center. I also prefer upgrading through the terminal though.