Dapper to Feisty

[Mario Vukelic]

On Tue, 2007-04-17 at 19:23 +0530, H.S.Rai wrote:
> So, I upgraded to Edgy,
> by updating first, and then replacing dapper with edgy in source.list,
> then doing apt-get update, upgrade. 

You should follow the upgrade information (note: apt-get/aptitude is
*not* recommended)
https://help.ubuntu.com/community/EdgyUpgrades
https://help.ubuntu.com/community/FeistyUpgrades

If you want to use it nevertheless, do it correctly: use apt-get
dist-upgrade, not upgrade. upgrade *will* break your system. More info
on how to use these commands is also at the above links