Upgrade Ubuntu 10.04 LTS Server to 12.04 LTS Server

1. Ensure all the latest updates have been applied to your Ubuntu 10.04 LTS instance by running:

sudo apt-get update && sudo apt-get upgrade

Follow the on-screen instructions.

2. Install update-manager-core if it is not already installed:

sudo apt-get install update-manager-core

3. If and only if upgrading from an LTS release, then edit /etc/update-manager/release-upgrades and set Prompt=lts

4. Launch the upgrade tool:

do-release-upgrade

Follow the on-screen instructions.

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