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I am running Ubuntu Lucid and would like to upgrade to Precise, using the normal ubuntu-12.04.1-desktop-...iso image.

So far I have tried upgrading with the CD but was not given the choice. Searching on the internet, I have found upgrading using the ubuntu-12.04.1-alternate-...iso image works, but I don't have great internet access.

Is upgrading from Lucid possible, with the ubuntu-12.04.1-desktop image?

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2 Answers

YES.

If was always intended that the point-release (Ubuntu 12.04.1 LTS) would allow you to update from 10.04 LTS to 12.04 LTS.

However, if you simply run the install it will try to do a fresh install of 12.04.1 LTS.


If you insert the disk (or USB), does it not prompt you to upgrade to 12.04?

(Sorry, I haven't tried this recently on 10.04 LTS.)

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but there's no choice to upgrade from ubuntu 10.04 ? –  rahmad ars Aug 30 '12 at 12:43
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From https://help.ubuntu.com/community/LucidUpgrades appropriate changes for ubuntu version is made: Use this method if the system being upgraded is not connected to the Internet.

Download the alternate installation CD from http://releases.ubuntu.com/precise/

Burn the ISO to a CD and insert it into the CD-ROM drive of the computer to be upgraded.

    If the ISO file is on the computer to be upgraded, you could avoid wasting a CD by mounting the ISO as a drive with a command like:

    sudo mount -o loop ~/Desktop/ubuntu-12.04.1-alternate-i386.iso /media/cdrom0

A dialog will be displayed offering you the opportunity to upgrade using that CD.
Follow the on-screen instructions. 

If the upgrade dialog is not displayed for any reason, you may also run the following command using Alt+F2:

gksu "sh /cdrom/cdromupgrade"

Or in Kubuntu run the following command using Alt+F2:

kdesudo "sh /cdrom/cdromupgrade"
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