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I have Ubuntu 12.10 installed and until a few weeks back it used to remind me to do an upgrade to 13.04 but at that time I was not interested. Now that I want to upgrade I don't know how to do that.I tried update manager in the dashboard but it says all software is updated.

How do I force the upgrade?

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up vote 9 down vote accepted

To upgrade from 12.10 to 13.04, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

sudo apt-get update && sudo apt-get dist-upgrade
sudo update-manager -d

Once that is done, a window will open, just click on Upgrade.

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Thanks a lot. The -d option did the trick. – Sankalp May 23 '13 at 19:07
If this answered your question, you may mark this answer as accepted. – Mitch May 23 '13 at 19:08

Hit Ctrl+Alt+T to open a terminal, and type the following:

update-manager -d
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