Docker is another container service like Kubernetes. There are probably more prominent differences, but for now, I see that there is a whale.
Though we installed it through the GUI on Mac, we still use it through the good old command line / terminal.
We generated that with docker run hello-world, and while at first it gave me an error, it soon found the image from the hub, put the image into a container, and put it onto the bash. Technology is amazing.
Here's the tutorial! Let's look at 1.0 - 1.1
The actual files (notice that the key is different between this and the first image because I closed the program and opened it)
Actually opening and using Busybox on the Mac terminal with docker run busybox [echo "Hello"]
Listing containers with docker ps -a
The help list.
Removing containers (the first two after running docker ps -a starting with cefc and e678)