I'm trying 18 --> 19.
I will report back on how it goes!
I'm trying to upgrade my Fedora install from 19 (3.12.8-200.fc19.x86_64) to 20.
I have run into a problem whilst upgrading from FC20 to FC21 using Fedup-0.9.1-1.fc20.
I run Cinnamon desktop and followed advice (don't have link) to go about it as follows:
yum install fedup
fedup --network 21 --product=nonproduct --nogpgcheck --reboot
After all the packages were downloaded it commenced "Testing upgrade transaction", and part way