This is guide, howto upgrade Fedora 19 to Fedora 20 (Heisenbug) using YUM.
I have tested this method on several machines, but if you have problems, please let me know. Always remember backup, before upgrade!
1. Before Upgrade
1.1 Backup Your Data
Before doing anything, do full system backup or backup at least your important data: documents, pictures, videos, config files, log files, databases etc. This is very important, because if something go wrong and you have to do fresh install, then you can easily restore your data.
2. Upgrade Fedora 19 to Fedora 20
2.1 Change root user
su - ## OR ## sudo -i
2.2 Update Fedora 19 Packages
2.3 Reboot Your System
Just make sure that you are running latest kernel.
2.4 Install FedUp
It’s probably installed already.
yum install fedup
2.4 Start Upgrading Using FedUp
fedup-cli --network 20 --debuglog /root/fedup-19to20.debug.log
When this finish, check if there is any errors in fedup.debug.log.
You can enable additional repos, with using following option:
2.5 Reboot System