Upgrading from Ubuntu 5.10 (Breezy Badger) to 7.04 (Feisty Fawn)
Upgrading from Ubuntu 5.10 to Ubuntu 7.04 is only possible if done progressively through the intermediate versions of Ubuntu 6.06 (Edgy Eft), and 6.10 LTS.
I just tried to install Ubuntu Feisty Fawn on two DELL desktop systems, one with an AMD processor, and another with an Intel Celeron, and on both the installation process was very very slow to the point where I have to abort the installation.
On the DELL system with an AMD, I got an error message that is related to the fact that Feisty Fawn has both the installation and the Live version of Ubuntu Linux on the same disc.
Since I do not have the original Windows CDs for these systems, I decided to add them to my growing number of PCs running on Ubuntu Linux by installing Ubuntu 5.10. My thought was that I could first install Ubuntu 5.10, and then progressively upgrade to a later versions.
Upgrade Restriction
With 5.10 installed, the only way to upgrade to Feisty Fawn (7.10) is either by rebooting the system with the Feisty Fawn CD-ROM to re-install Ubuntu (Will probably result in the same slow performance), by installing Feisty Fawn in a new partition, or by progressively upgrading through the other versions that are available to each lesser-version's update manager until one gets to a version that has Feisty Fawn as the next update.
Upgrading to Ubuntu 6.06 (Edgy Eft)
From the System -> Administration -> Update manager in Ubuntu 5.10 is an option to upgrade to Ubuntu 6.10 (Edgy Eft). Select that option and go through the entire upgrade process as prompted by the dialogs. The system will scan the installation, download the Ubuntu 6.06 LTS files, install them and restart the computer to complete the installation.



Comments
Installing Ubuntu 7.04 Fiesty Fawn CD-ROM very slow - Solution
When installing Ubuntu 7.04 Feisty fawn on one of my Dell machines, I experienced a situation where the CD-ROM was reading very slowly, and therefore making the installation process very slow. It was slow to the point where it ws impossible to successfully install Ubuntu Feisty Fawn 7.04 directly from CD. Being that it is not possible to upgrade to Feisty Fawn from an earlier vesion without booting into 7.04, I was previously limited t installing Ubuntu 5.10 from a CD, and then upgrading progressively to Ubuntu 6.10.
The solution to the slow installation process for Ubuntu Feisty Fawn is adding memory to your PC. After upgrading my Dell Intel Pentium 4, 2.8Ghz RAM from 256 Megabytes to 768MB, I was able to significatly speed up Ubuntu 5.10, and I was able to install Ubuntu Feisty Fawn 7.04 very quickly taking approximately 45 minutes from beginning to end.
I previously thought that the CD-ROM was dirty or slow, but I now know what the real cause was. The lesson from this experience is to pay attention to he minimum, and recommended hardware prerequisites and requirements for installing software applications
Upgrading from Ubuntu 5.10
Launching the update manager from the terminal
I would suggest following the steps outlined in http://cmsproducer.com/ubuntu-upgrade-6.06-LTS-dapper-edgy-GUI to trigger the update manager including all available updates and upgrades:
gksu âupdate-manager -c -dâ