Container commands

Now let’s dive deeper into some of the more complicated, but important, commands and command invocations that you may run into when working with Docker.

docker run

Let’s look at a more complex invocation of the docker run command we used earlier:

 docker run --rm --name mywebcontainer -p 80:80 -v /tmp:/usr/share/nginx/html:ro -d nginx

• --rm: Clean up (remove) this container when it exits.
• --name mywebcontainer: Give this container a friendly name – mywebcontainer.
• -p 80:80: Map port 80 of the host to port 80 in the container. The left port number is on the “outside” (the environment running the container), and the right port number represents the “inside” (container) port. For example, -p 4000:80 will map the container’s port 80 to localhost:4000.
• -v /tmp:/usr/share/nginx/html:ro: Mount a volume – the host environment’s /tmp directory will be mounted into...