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The new Ubuntu 24.04 has been release but I can't upgrade the system using the update manager, because nothing appears. I have Ubuntu 23.10. I tried to change to long term releases and back to any version to no avail.

I don't know what I can do to upgrade beside installing again.

Is there a command I can use upgrade to Ubuntu 24.04 from Ubuntu 23.10 ?

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    conventional wisdom suggests upgrading after the first point release which in this case will be this summer (around August) is the best plan. Don't be too hasty - you might live to regret it if you read some of the questions rainsed here over the past few days...
    – graham
    Apr 27 at 11:55

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From the Ubuntu 24.04 Release Notes:

Upgrades

Users of Ubuntu 23.10 will be offered an automatic upgrade to 24.04 soon after the release. Users of 22.04 LTS however will be offered the automatic upgrade when 24.04.1 LTS is released, which is scheduled for the 15th of August.

"Soon after the release" typically does not mean a day or two. Historically, it has meant several weeks.

  • It will be offered to 23.10 users when it has been tested and is ready. When the Ubuntu Release Team decides upon a date, they will announce it.
  • It will be offered to 22.04 LTS users around 15 August 2024.

Non-LTS users are sometimes surprised by this LTS-specific delay in relase-upgrades. The much larger numbers of LTS users has led to a phased rollout of LTS releases so that the community and developers can offer the best support as inevitable problems are discovered.

  • Impatient folks can experiment with a release-upgrade by using do-release-upgrade -d, which still works for a week or two until the next development release repositories are set up. However, be warned that it might fail. You may encounter unexpected behavior. Your system may become unbootable. You may lose data. The use of -d means "I want to be a tester" and that you are willing to accept risk.
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  • where i can see when its going to be avaiable
    – Tiago Earth
    Apr 27 at 11:56
  • Link to the Release Team schedule added.
    – user535733
    Apr 27 at 12:04
  • @Tiago Earth Don't you do daily updates at closedown every day ? If you do, it'll be here when it's here . . .
    – Trunk
    2 days ago
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Don't try to upgrade the day Ubuntu 24.04 is released

Some upgrade bugs are still getting ironed out

See this post for details: Why You Shouldn’t Upgrade to Ubuntu 24.04 LTS Yet

Just wait a week or two. Eventually when you open the Software Updater app, it will prompt you to upgrade. Big upgrades like this are rolled out in stages, so that everyone does not try to upgrade at the same time and overload and crash the download servers.

For upgrade from 22.04 to 24.04

The wait is not over yet. LTS release upgrade prompt won't appear until a few weeks after the version 24.04.1 is released in August 2024.

Hope this helps

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