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I'm trying to upgrade my Ubuntu from 18.04 to 20.04. However, I'm always getting the same error message:

"Checking for a new Ubuntu release" "Please install all available updates for your release before upgrading."

I would appreciate it if someone could help me with this issue.

It does not work using commands from the terminal nor through the Software Updater.

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  • Have you held back any package? This might be the cause of such an error. – To Do Mar 2 at 7:36
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open terminal then try this:

sudo apt update && sudo apt dist-upgrade -y

after all upgrade package installed try to run:

sudo do-release-upgrade -d -f DistUpgradeViewGtk3

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