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This is guide, howto upgrade Fedora 14 to Fedora 15 with Preupgrade. Preupgrade download needed packages from the server, set up everything and then reboot to installer and after install boot the new system. It’s important backup your important files before upgrading.

If the aim is to update older versions of Fedora to Fedora 15, then each version have to be upgraded step by step:
Upgrade Fedora 12 to Fedora 13 with Preupgrade >>
Upgrade Fedora 13 to Fedora 14 with Preupgrade >>

From Fedora 12 to Fedora 13 guide describe Preupgrade command line method. This guide works also with from Fedora 13 to Fedora 14 upgrade and from Fedora 14 to Fedora 15 upgrade.

If the Fedora version is older than Fedora 12 then I recommend Fedora 15 clean install. Also in other situations, a clean install may be sensible.

1. Upgrade Fedora 14 to Fedora 15 with Preupgrade

1.1 First start with updating all Fedora 14 packages with following command as root:

yum update

1.2 Install preupgrade as root

yum install preupgrade

1.3 Start preupgrade as root

preupgrade

1.4 Preupgrade information window

Preupgrade information window

1.5 Choose desired release

Preupgrade choose desired release

1.6 Preparing system for upgrade

Preupgrade preparing system for upgrade

1.7 When ready to begin upgrade then reboot.

Preupgrade ready to begin ugrade

1.8 Installing Fedora 15 packages

Preupgrade upgrading and installing Fedora 15 packages

Preupgrade upgrading and installing more Fedora 15 packages

1.9 Booting just upgraded Fedora 15 system

Fedora 15 (F15) Booting

1.10 Fedora 15 login window

Fedora 15 (F15) Login-screen

1.11 Fedora 15 desktop screenshots

Gnome 3 Shell plain

Fedora 15 Gnome Shell plain

Gnome 3 Shell Activities

Fedora 15 Gnome Shell activities

Gnome 3 Shell Activities Firefox running

Fedora 15 Gnome Shell Activities Firefox running

Gnome 3 Desktop on fallback mode

Fedora 15 (F15) Desktop

2. Post-Upgrade Tasks

2.1 Remove unsupported packages

Get the list with following command:

package-cleanup --orphans

Then remove listed packages with following command:

yum remove package1 package2 ...

2.2 Check All .rpmsave and .rpmnew Files

You find these files with following command:

find / -print | egrep "rpmnew$|rpmsave$"

Depending on the differences between original and new files. You may need to manually merge new settings from new configuration files.

3. Troubleshooting

3.1 Not enough space on disk, check following tips

Free up space
Trick preupgrade into downloading the installer

4. Fedora 15 Laughlin Guides/Howtos

#### [Install Google Chrome with YUM on Fedora 15 >>](/2010/install-google-chrome-with-yum-on-fedora-red-hat-rhel/)

Install Chromium (dev) Browser on Fedora 15 >>

Install/Update Opera on Fedora 15 >>

Install Sun/Oracle Java JDK/JRE 6 on Fedora 15 >>

Install Sun/Oracle Java JDK/JRE 7 on Fedora 15 >>

Install Eclipse SDK 3.6 (Helios) on Fedora 15 >>

Install LAMP (Linux, Apache, MySQL, PHP) on Fedora 15 >>

Install MySQL 5.5 on Fedora 15 >>

Install Apache (httpd) and PHP 5.3.6 on Fedora 15 >>

Apache Userdir with SELinux on Fedora 15 >>

Install Adobe Flash Player 10.2 on Fedora 15 >>

Install Adobe (Acrobat PDF) Reader on Fedora 15 >>

Install OpenOffice.org 3.3.0/3.4.0 on Fedora 15 >>

Install VirtualBox 4.0 on Fedora 15 >>

Install VirtualBox Guest Additions on Fedora 15 >>