README first.

petulia3478

Notes:

When using help in docker cli, remember to use the --help and not just help.
Without the -- docker thinks help is an image.

The brief description of invoking a container via the cli.

$ docker run centos /usr/bin/free -a

run - runs a new container.
centos - is the base image.
/usr/bin/free - is the command I want to run in the container.
-a - is the option.

Notes:

When using docker images if you do not specify a version. Docker will default to the latest version.
Use the --rm option to docker run when you want docker to cleanup after it as exited.