At he ScienceLogic Symposium. 
Interesting slide

that was easy

sudo dnf install dnf-plugin-system-upgrade

sudo dnf system-upgrade download –releasever=23 –best

sudo dnf system-upgrade reboot

done 🙂

For anyone updating from Fedora 22 to Fedora 23

http://fedoramagazine.org/upgrading-from-fedora-22-to-fedora-23