I upgraded my laptop from Fedora 27 to Fedora 28 last night and I’ve got to say it’s was one of the most painless upgrades I’ve ever done. Here’s how I did it.
1, Make sure you’re system is backed up and has all the most recent packages [I’m not responsible for a hosed system if this doesn’t work for you
dnf upgrade --refresh
2, Install the dnf upgrade plugin
dnf install dnf-plugin-system-upgrade
3, Start the upgrade [Please note this will only download the packages, it won’t install them
dnf system-upgrade download --releasever=28
4, Start the upgrade process
dnf system-upgrade reboot
Your system will reboot and start the upgrade process, depending on the speed of your system it might take awhile.
If you have any problems you might have to disable third party repos you have installed on your computer.