I was using Ubuntu 9.10 version and today I want to upgrade to 10.10.
I updated my ubuntu 9.10 with this commands:
sudo aptitude install ubuntu-desktop sudo aptitude update && sudo aptitude safe-upgrade update-manager -d
But when I opened update manager I couldn't see button for upgrading to 10.10 (or 10.04) will be available.
How can I upgrade now?