How Do You Enter a Docker Container?

Problem scenario
You have a Docker host that is running Linux (the server with Docker containers).  You want to run commands inside a Docker container.  How do you get into a Docker container?

Solution
Prerequisite
You need to know the container ID of a running container.  To find it run this: docker ps -a

Procedures
Run this command:
docker exec -it <container ID> bash

You may want to see this posting.  To view a list of Docker books, see this link.

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