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I have a very old installation of Jaunty that I would like to eventually get up to the current version of Ubuntu LTS.

I cannot do the normal network upgrades, as there is no continued support for this. My question is, can I mount a .iso file for Ubuntu 10.04 and upgrade to that from this mounted CD?

I understand that it would be better to do a fresh install at this point, but that may be difficult, as I don't have direct physical access to the server.

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I had the same problem and I was ble with a small tweak to upgrade "as-usual" my Jaunty server and Desktop installations to the latest LTS.

I have put all the details how to do a smooth upgrade from Jaunty to Karmic (even if EOL) in another answer.

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