The next Ubuntu version 11.04 Natty Narwhal is coming soon, if you intend to upgrade to 11.04 from current Ubuntu version there are 4 ways you can choose including online and offline upgrading.
Note: Make a backup of the sources, softwares, and important data, upgrade may cause something incompatible.
1.) GUI upgrading with update-manager
This is the most normal way to upgrade Ubu
Currently using 11.10 on a new dell vostro 2420 laptop and wanted to upgrade to 12.04.01lte.
Using the update manager and clicking the upgrade option first came up with a 'failure to authenticate' message and after a restart of the computer I click the upgrade and it will download 2 files then the popup closes and no further prompts/screens come up.
I upgrade from 13.10 to 14.04. I got computer not stable and upgrade aborted and recover to old version, but I let it continue to complete. It says upgrade complete with errors. It did not process clean up and I checked about this computer it says Ubuntu 14.04
After I reboot the computer, it shows Ubuntu 14.04 LTS, it seems that I completed the update.