Docker: Difference between docker.io and docker-ce

Older versions of Docker were called docker or docker-engine or docker.io

docker-io package was the name used on Debian/Ubuntu for the official docker release.

Main reason was to avoid a name conflict with Ubuntu docker system-tray binary.

Docker now has an enterprise version (EE) and a free community Edition version(CE)

Prior to installing Docker Community Edition you would need to remove older binaries.

Centos/RHL:

sudo yum remove docker \
                  docker-common \
                  docker-selinux \
                  docker-engine

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