How to use PreUpgrade - FedoraProject

How to use PreUpgrade

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PreUpgrade is an application users run on an existing Fedora 8 or above installation, that resolves and downloads packages required to upgrade Fedora. While PreUpgrade downloads the necessary packages, users are free to continue using their systems. This gives an experience similar to a live upgrade. For additional information, please refer to the PreUpgrade feature page.

Upgrade to current release directly
Preupgrade provides an upgrade directly to the latest version of Fedora. It is not necessary to upgrade to intermediate versions. For example, it is possible to go from Fedora 10 to Fedora 12 directly.

Contents

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• 1 Prepare the system
• 2 Perform the upgrade
• 3 Common post-upgrade tasks
  • 3.1 Removing unsupported packages
  • 3.2 Examine .rpmsave and .rpmnew files
• 4 Troubleshooting
  • 4.1 Not enough space in /boot
    • 4.1.1 Method 1: Free up space
    • 4.1.2 Method 2: Trick preupgrade into downloading the installer
  • 4.2 Upgrade does not install upon reboot
    • 4.2.1 Explanation
    • 4.2.2 Method 1: Boot Manually from Grub Command Line
    • 4.2.3 Method 2: Edit the Grub menu.lst File

Read more...
http://fedoraproject.org/wiki/PreUpgrade

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