I installed docker on my Ubuntu desktop (20.04.3 LTS) and then uninstalled it.
So when I run
it says command not found.
However when I run the following command,
sudo apt update
It gives me the following,
I am very new to Ubuntu and I assume there must be a file that it is reading to get workout which packages it needs to update.
So how do I clear the docker messages?
Thanks in advance
Source: Docker Questions