How can I upgrade to Ubuntu 11.10 from 11.04 other than online? Thanks for your reply. I have downloaded the iso file but when i run the cdromupgrade script and selected the option not to use t he internet connection .But after some time the upgrade fails stating that no internet connection ,fail to fetch files
Without any access to the internet, I don't believe there is any way to upgrade. You'll need a copy of installation media and it's not really available in stores. If you can get a friend with internet access to get a copy of the iso, they rip a CD for you or create a USB install.
Upgrading Using the Alternate CD/DVD
Download the alternate installation CD from http://releases.ubuntu.com/oneiric/
A dialog will be displayed offering you the opportunity to upgrade using that CD. Follow the on-screen instructions.
If the upgrade dialog is not displayed for any reason, you may also run the following command using Alt+F2:
Source : here