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This question already has an answer here:

I was under the impression that upgrading to Ubuntu 14.04 was supported from all version between and including the previous LTS release (12.04). Why is it then, that update-manager (with and without -d option) will only offer to upgrade to version 13.10 from my Ubuntu 12.10 system? Even that only works when I change the updater settings from "For long-term support versions" to "For any new version."

Is it only possible to upgrade to 14.04 via 13.10?

marked as duplicate by karel, Radu Rădeanu, Eric Carvalho, Warren Hill, Danatela Apr 25 '14 at 2:42

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  • You will probably get a cleaner system if you first backup your personal data then install 14.04 clean and finally restore your personal data from your backup. – Warren Hill Apr 24 '14 at 12:12
  • This is a valid approach, but not preferable, due to the downtime involved. I'll be making a complete backup before attempting the upgrade, so if something goes completely wrong during the upgrade, I can always fall back on a clean install and restore from backup. – Avian00 Apr 25 '14 at 8:12
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Did you try

sudo apt-get update
sudo apt-get dist-upgrade
sudo do-release-upgrade

This should upgrade your system to 14.04 from 12.04 without any problem

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    I don't believe this works from 12.10. It only offers me release 13.10, just as update-manager does. – Avian00 Apr 23 '14 at 13:49
  • @Avian00 - it works; I've just done it myself. – pomaxa Aug 25 '14 at 15:21
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    Can't update since I got Not Found message for all ubuntu quantal repos. W: Failed to fetch archive.ubuntu.com/ubuntu/dists/quantal-security/universe/… 404 Not Found [IP: 91.189.91.14 80] – installero Sep 7 '14 at 9:14
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    @Phani: You get the 404 because Ubuntu has removed Quantal from its normal mirrors. DigitalOcean still has a mirror of Quantal at mirrors.digitalocean.com/ubuntu-old. Replace the URLs in your /etc/apt/sources.list with this and you will be able to update Quantal to the last packages released. – jeffcook2150 Sep 23 '14 at 8:47
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    FYI if do-release-upgrade results in command not found you need to apt-get install update-manager-core – Wes Johnson Sep 25 '14 at 23:17

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