To update Feisty to Gutsy i have made this steps:
sudo apt-get update; sudo apt-get upgrade; sudo apt-get dist-upgrade; sudo apt-get autoclean; sudo apt-get clean
i changed all reference of feisty to gutsy into /etc/apt/sources.list
and i made sudo apt-get update; sudo apt-get upgrade; sudo apt-get dist upgrade
To update Feisty to Gutsy i have made this steps: sources. list
sudo apt-get update; sudo apt-get upgrade; sudo apt-get dist-upgrade; sudo apt-get autoclean; sudo apt-get clean
i changed all reference of feisty to gutsy into /etc/apt/
and i made sudo apt-get update; sudo apt-get upgrade; sudo apt-get dist upgrade
Thank you.
HTH