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I upgraded to Ubuntu 19.10 beta before the stable branch released using sudo do-release-upgrade -d now that the stable version of 19.10 has released, how do I downgrade to 19.10 stable without re-installing the entire os?
This question is specific to a release of Ubuntu which has reached its end of standard support or end of life date, and is not related to asking for help to upgrade to a supported release.
/etc/apt/sources.list
to verify.