During installation of Ubuntu 18.04, after the runtime environment is enabled, and during the first login, a question pops up asking whether you want to Help Improve Ubuntu.
(Screenshot is from the 18.04 first-login "Welcome" process)
If you say yes, then a brief report is sent to Canonical describing basic characteristics of your system such as Processor type (AMD or i386), screen resolution and the default desktop environment. Nothing very intrusive.
This helps Canonical get an accurate count of installations and such. And they ask it so obviously and politely that I decided that "It's not a bug - it's a feature" and is OK by me.
So I said yes but now I have changed my mind due to the reporting that suggests that Canonical will become the next Microsoft - but do not want to reinstall my system.
How can I turn this feature off?