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I have around 10 PCs, they currently have Ubuntu 11.04 running. I need to upgrade the PCs from 11.04 to 12.04 without downloading all the Ubuntu Packages every time. What would be the best way to upgrade them? I do not want to loose settings and/or data on these PCs, so re-installing is not an option.

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Simple: Create a 12.04 CD or USB- Stick, boot it up and choose the upgrade option when asked.

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You will not loose any settings and/or data this way.

EDIT: It seems I didn't do my homework properly, I'm sorry. You will have to do the whole procedure twice, first by upgrading to 11.10, and then to 12.04. I wish there was a better solution (besides a fresh install), however I don't know of any.

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  • -1 It is impossible to upgrade from 11.04 to 12.04 directly This upgrade is dangerous This upgrade may lose packages – Tachyons May 4 '12 at 11:19
  • I had gone through your answer but the upgrade option already disable. – diff May 5 '12 at 8:34

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