Check the Running Docker

Images and containers

We can start multiple containers from a single image. The image is read-only in this relationship, but each container is read-write. As shown in the figure below, Docker accomplishes this by creating a thin read-write layer for each container and placing it on top of the shared image.

In the figure above, each container has its own thin R/W layer but shares the same image. The containers can see and access the files and apps in ...