This is guide, howto upgrade Fedora 20 (Heisenbug) to Fedora 21 using FedUp.

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 20 to Fedora 21 using FedUp

2.1 Change root user

su -
## OR ##
sudo -i

2.2 Update Fedora 20 Packages

yum update

2.3 Reboot Your System

Just make sure that you are running latest kernel.


2.4 Install FedUp

It’s probably installed already.

yum update fedup fedora-release

2.4 Start Upgrading Using FedUp

Note: you should also specify new option “–product=” available products:

  • workstation – default Fedora experience for laptops and desktops, powered by GNOME.
  • server – default Fedora experience for servers
  • cloud – base image for use on public and private clouds
  • nonproduct – choose this if none of the above apply. Choose this if you are using an alternate-desktop spin of Fedora. If you prefer to maintain your current set of packages (and not install example all Gnome packages), select ‘nonproduct’.
fedup-cli --network 21 --product=workstation --debuglog /root/fedup-20to21.debug.log

When this finish, check if there is any errors in fedup.debug.log.

You can enable additional repos, with using following option:

--enablerepo REPO

2.5 Reboot System


2.6 Grub 2 Menu with FedUp

Fedora 21 FedUp Grub2

2.7 FedUp Upgrading Fedora 20 to Fedora 21

Fedora 21 FedUp Upgrading

Fedora 21 FedUp Upgrading

Fedora 21 FedUp Upgrading Clean Up

2.8 Boot Upgraded Fedora 21

Fedora 21 Grub

3. Fedora 21 Screenshots

3.1 Fedora 21 GDM Login Screen

Fedora 21 GDM Login Window

3.2 Fedora 21 Plain Desktop Gnome Shell 3.14.2

Fedora 21 Gnome Shell 3.14.2 Plain

3.3 Fedora 21 and Gnome 3.14.2

Fedora 21 Gnome 3.14.2 Details

4. Fedora 21 Clean Up Post Upgrade (as root user)

4.1 Rebuilding the RPM DB

rpm --rebuilddb

4.2 Do Distro Sync

yum distro-sync --setopt=deltarpm=0

4.3 Check All Your Config Files

Use rpmconf to find .rpmnew, .rpmsave and .rpmorig files. You can keep current version, place back old version, watch the diff or merge.

yum install rpmconf

rpmconf -a

4.4 Google Chrome Users Have to Remove and Install Google Chrome Due to Google-Chrome Packaging Bug

yum remove google-chrome-\*

yum install google-chrome-stable
## OR ##
yum install google-chrome-beta
## OR ##
yum install google-chrome-unstable