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Create an empty file to prevent the service from starting
sudo touch /etc/cloud/cloud-init.disabled
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Disable all services (uncheck everything except "None"):
sudo dpkg-reconfigure cloud-init
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Uninstall the package and delete the folders
sudo dpkg-reconfigure cloud-init sudo apt-get purge cloud-init sudo rm -rf /etc/cloud/ && sudo rm -rf /var/lib/cloud/
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Restart the computer
sudo reboot
Uninstalling on Ubuntu 22.04 marks neccessary packages like netplan.io for autoremove. you should mark them firs as manual before removing cloud-init