Dê uma olhada em esta coleção de etapas de atualização :
15 a 16:
$ sudo sed -i 's/raring/saucy/' /etc/apt/sources.list.d/official-package-repositories.list
$ sudo sed -i 's/olivia/petra/' /etc/apt/sources.list.d/official-package-repositories.list
$ sudo apt-get update && sudo apt-get dist-upgrade
$ sudo apt-get upgrade
$ sudo shutdown -r now
16 a 17
sudo sed -i 's/saucy/trusty/' /etc/apt/sources.list.d/official-package-repositories.list
sudo sed -i 's/petra/qiana/' /etc/apt/sources.list.d/official-package-repositories.list
sudo apt-get update && sudo apt-get dist-upgrade
sudo apt-get upgrade
sudo shutdown -r now
Editar:
Para Saucy, os passos são realmente (cuide da nova terceira linha):
$ sudo sed -i 's/raring/saucy/' /etc/apt/sources.list.d/official-package-repositories.list
$ sudo sed -i 's/olivia/petra/' /etc/apt/sources.list.d/official-package-repositories.list
$ sudo sed -i -e 's/archive.ubuntu.com\|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list.d/official-package-repositories.list
$ sudo apt-get update && sudo apt-get dist-upgrade
$ sudo apt-get upgrade
$ sudo shutdown -r now
Então, 16 a 17:
sudo sed -i 's/saucy/trusty/' /etc/apt/sources.list.d/official-package-repositories.list
sudo sed -i 's/petra/qiana/' /etc/apt/sources.list.d/official-package-repositories.list
sudo sed -i '/security/ s/old-releases/security/; s/old-releases/archive/' /etc/apt/sources.list.d/official-package-repositories.list
sudo apt-get update && sudo apt-get dist-upgrade
sudo apt-get upgrade
sudo shutdown -r now