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Can't upgrade ubuntu server from 10.04 LTS to 12.04 LTS

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http://askubuntu.com – I'm trying to upgrade my 10.04 server using do-release-upgrade, but it keeps saying there is no new version available. If I change the prompt config in /etc/update-manager/release-upgrades to normal, I am able to upgrade to 10.10 though, but I don't want to perform 4 separate upgrades in order to reach the new lts. (HowTos)

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Submitted by funckax on 06/21/2012 – Made popular on 06/21/2012

Stories similar to Can't upgrade ubuntu server from 10.04 LTS to 12.04 LTS

I'm trying to upgrade one of my servers from Ubuntu 12.04 LTS to 12.10 using the following commands.

First I edit /etc/update-manager/release-upgrades and change Prompt=lts to Prompt=normal. Then I start the upgrade with do-release-upgrade -d

The upgrade starts but fails immediately with the following output. I've already googled for this problem but didn't find any information.

[ubuntu] Upgrade errors 17 weeks 4 days ago

whenever I try to upgrade from 10.04 to 12.10 i get the following error do-release-upgrade

Quote:

Checking for a new ubuntu release ERROR: failed to read '/etc/update-manager/release-upgrades': File contains no section headers.

Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do?

I started upgrading to 12.10 in terminal and was asked what to do about a change in /etc/update-manager/release-upgrades vs /etc/update-manager/release-upgrades.dpkg-new.

D was an option to see what the difference is between the two.

sudo apt-get install update-manager-core

/etc/update-manager/release-upgrades

Prompt=normal;

sudo apt-get update && sudo apt-get upgrade

sudo do-release-upgrade -d

Follow me so far? Hope so....

Updating repository information WARNING: Failed to read mirror file

Third party sources disabled

Some third party entries in your sources.list were disabled.

I have an Ubuntu server and last week I ran Code: do-release-upgrade and it did the upgrade perfectly. It also did every other upgrade for the last 2 years no problem. When the upgrade finished and it rebooted, I SSH into it and it told me again there is an update. But when I run the command again it tells me there's no upgrade available.

I googled and looked into all unkown issues on ubuntu forums but I can't figure out why a 10.04 LTS server won't detect the last LTS 12.04.1.

I am trying to upgrade from 11.10 to 12.04 and the upgrade seems to be stuck downloading ttf-mscorefonts.

I usually use apt-get update && apt-get upgrade to run my updates and upgrades instead of the GUI because it seems to run more quickly.

However, I've noticed lately that I often get a message that one of my upgrades was held back. I then usually run dist-upgrade to run it through and it works fine.

I have a cluster of about 50 ubuntu nodes which are currently running maverick release. I'd like to upgrade them to oneiric, but I'm having a difficulty choosing the right tools.

I know ubuntu has the 'unattended-upgrade' utility, but it's only meant for security upgrades and cannot switch the whole release.