Make sure that you install the latest version of the fedup client on the system to be upgraded. At the time of this writing (2013-08-01), that is fedup-0.7.3-4.fc18
Do a full system update and reboot to ensure that any kernel changes are running
Be sure to get the latest release, this may involve enabling updates-testing (yum –enablerepo=updates-testing install fedup in the command line)
Network upgrade is strongly recommended
It is strongly recommended to use the network upgrade instead of offline update modes (ISO, local device). Network upgrade will ensure you receive the latest packages from Fedora 20. If you use local media containing old Fedora 20 packages, you might end up with a mixture of Fedora 19 and Fedora 20 packages and the system might not work properly until you fully update it after reboot (if it boots at all).
Using a network source is the easiest method of upgrading and will pull in updates while upgrading – eliminating the potential issue if your current system has a newer kernel version than the Fedora release to which you are upgrading.
Start the upgrade prep by executing following command
$ sudo fedup-cli –network 20
Once the preparations have completed, check the /var/log/fedup.log file if any errors show up in the output from fedup-cli
Sources from https://fedoraproject.org/wiki/FedUp
Unfortunately, tested upgrading from Fedora 19 to Fedora 20 failed. Had errors as listed below:
getting boot images…
.treeinfo | 1.1 kB 00:00
Downloading failed: couldn’t get boot images: HTTP Error 404 – Not Found
After i solved it by using mirrors as below command
$ fedup –network 20 –instrepo http://mirror.nus.edu.sg/fedora/linux/development/20/x86_64/os/
You may find all the mirrors listed below:
Then it took few hours to download and finally the system asked me to reboot to upgrade. However, it still failed. Tired of trying more than a couple of times. So i decided to download the new Fedora 20 iso and install it fresh new. How is your experiences Upgrading to Fedora 20 via FedUp?