I have installed docker as described here raspberrypi.org/blog/docker-comes-to-raspberry-pi with
curl -sSL https://get.docker.com | sh.
How do I uninstall it?
I had to use
sudo apt remove docker-ce. The script at get.docker.com runs
"$pkg_manager install -y -q docker-ce$pkg_version" so
docker-ce is the package, not
Remove any USB Ethernet entries that you might have put at the bottom of the
why? I upgraded to buster stable and my RPi3B+ seemed like it was fire-walled. Above fixes ethernet ghosted connections, WIFI was working. I say ghosted because the Plymouth desktop showed a live connected eth0 and Ip address, for example, 192.168.1.100 but couldn't ping anything local to remote and vice versa. If I locally clicked on the WiCD icon the network would come alive. But not on a reboot.
The residue of Docker USB-net connections to the swarm, in the dhcpd, was stopping me using the ethernet.