when i start upgrading ubuntu it gives an upgrade failure error "This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu"

Asked by shrikant on 2015-06-23

This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

please tell me how to upgrade from 10.04 to 12.04

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: update-manager 1:0.134.7
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
Architecture: i386
Date: Tue Jun 23 20:42:50 2015
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
PackageArchitecture: all
ProcEnviron:
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: update-manager

Brian Murray (brian-murray) said : #1

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We understand the difficulties you are facing, but it is better to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs. You can also find help posting your problem in the support forum of your local Ubuntu's community http://loco.ubuntu.com/ or asking at http://askubuntu.com. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs.

If you boot to the 12.04 media you should be offered the upgrade.

I'd personally suggest that you wipe Lucid off and do a clean install of Trusty. Trusty is LTS and supported til April 2019

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