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Possible Duplicate:
How do I upgrade from 11.04 to 11.10?

When i open update manager to check for new versions it doesn show the 11.10 upgrade, i've tried also with apt-get update and it says my software is up to date. Can anyone help me??

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marked as duplicate by jokerdino, fossfreedom Mar 31 '12 at 11:23

This question was marked as an exact duplicate of an existing question.

Open terminal and type following:

sudo apt-get update && sudo apt-get -y upgrade
sudo do-release-upgrade

It should help you. If problem persists, write following to terminal:

sudo nano /etc/apt/sources.list

(if you aren't terminal-friendly, write gksudo gedit instead of sudo nano) and rewrite natty to oneric and do this:

sudo apt-get update
sudo apt-get upgrade
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