how can i move frome 9.10 to 10.04, i can't do it from the update manager.sudo apt-get upgrade doesn't work neither :Reading package lists... DoneBuilding dependency treeReading state information... Done0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Try: sudo do-release-upgrade or if you prefer just launch the upgrademanager, System, Administration, Update Manager. Then update as usual andrepeat it. It should then offer to upgrade to 10.04. If not, check yoursettings.