Ubuntu Upgrade: From Hardy Heron to Intrepid Ibex

I've been upgrading Ubuntu installations quite a few times recently, and thought it makes sense to post a really short how-to if you ever want to upgrade your Ubuntu distro from the command line.

Use apt-get to upgrade Ubuntu

The procedure for upgrading one Ubuntu release to another one is pretty straightforward. There are some rules though:

  1. Never attempt to skip a release or two when upgrading
  2. Never do a few Ubuntu release upgrades in a row without reboots in between
  3. Always backup the files you change
  4. Always have an install CD for your current Ubuntu release around

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