Natty has not been supported for over six months: https://wiki.ubuntu.com/Releases
The supported upgrade path it through 11.10, Oneiric, which is unsupported for four days now. If you hurry, perhaps Oneiric will still be on the archive servers, and the upgrade process will be easy. If Oneiric has already moved to http ://old-releases.ubuntu.com/releases it will be harder to upgrade, and it would be a good idea to seek advice from http://askubuntu.com. Try running sudo do-release-upgrade. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1179112 Title: W:Impossibile recuperare http://extras.ubuntu.com/ubuntu/dists/natty/main/source/Sources 404 Not Found To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1179112/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
