Docker Machine (aka DOCKER_HOST environment. Lightweight Linux VM)

• • 1. docker-machine IS the DOCKER_HOST. One & the same.
    2. The Docker-Machine (Docker_Host) is a lightweight Linux VM
    3. Docker-Machine: Linux environment in which docker server/daemon/engine runs inside
       1. Docker CAN run natively on Linux (no docker-machine needed)
       2. Docker CAN NOT run natively on OSX/Win (needs a Linux VM)
    4. Can see this Linux VM by opening Oracle VM VirtualBox Manager
       1. OSX → use Spotlight Search “Virtual”
    5. Two popular Linux distributions for desktop
       1. Ubuntu - Most user friendly. African word for “community spirit”
       2. Debian - Also very popular. Came first. Slower release cycle