do-release-upgrade fails. I get the following error message:
Checking for a new Ubuntu release Your Ubuntu release is not supported anymore. For upgrade information, please visit: http://www.ubuntu.com/releaseendoflife Err Upgrade tool signature 404 Not Found [IP: 2001:67c:1360:8c01::19 80] Err Upgrade tool 404 Not Found [IP: 2001:67c:1360:8c01::19 80] Fetched 0 B in 0s (0 B/s) WARNING:root:file 'raring.tar.gz.gpg' missing Failed to fetch Fetching the upgrade failed. There may be a network problem.
So it says my version is not supported anymore. I have Ubuntu Quantal (12.10). What should I do now?