After upgrading one of my CLI servers from 20.04 to 22.04, the dns resolver does not work anymore.
The upgrade itself finished without problem. Just I cannot even execute a host google.com anymore, or any other website.
How can I find the cause of this issue?
(a sub issue of this is that my docker containers now cannot connect to the dockerhub repository anymore, of course. But that should be solved as soon as dns works again).
Edit: probably duplicate of: How to set DNS on Ubuntu 22.04 when you have no netplan config?
