After upgrading to 19.04, what should i do with all PPA's that has been disabled for some reason? - Ask Ubuntu

Since for software/OS update, PPA can play a vital role. So: Should I enable them all? Or should I enable those which say "Disco"? Or should I remove all which doesn't say "Disco"? App update is

Cleaning up ppas in Software & Update after upgrading to Ubuntu

How to upgrade Ubuntu 21.10 to 22.04 after EOL - Quora

Ubuntu MATE 19.10 Release Notes

update manager - Disable Software Updater pop-up after 14.04 to

apt - Cannot upgrade system from 22.04 to 22.10 - Ask Ubuntu

How to Upgrade to Ubuntu 22.04 LTS

19.04 - Can't update securely and is therefore disabled? - Ask Ubuntu

Ubuntu Budgie 20.04LTS Release Notes for 18.04 Upgraders

Linux: Security Risks Associated with Updating from a Repository

apt - leftover after upgrade impish -> jammy - Ask Ubuntu

How to Remove and Disable an Individual PPA in Ubuntu 22.04

I cannot update Ubuntu 21.10 to 22.04 : r/Ubuntu