Upgrading from Fedora 22 to Fedora 23 is a command line away.
#dnf system-upgrade download --releasever 23
The command will download upgradeable packages from f23 repos. Note
this does not include application from third party like in my case
megasync client. What it include are packages from RPM fusion, which
means your codecs and packages you downloaded from the repo.
After the download is complete you can reboot.
#dnf system-upgrade reboot
The reboot process will automatically install Fedora 23.
Finally clean the cache with
#dnf system-upgrade clean all
Blogger since August 2007.
Linux user since 2004.
Fedora 23 kernel 4.2.3 GNU/Linux