Basic commands of Docker

$  docker version

$  docker info

Difference between Image and Container

The image is the in-rest version of the container which has all the configurations we have done.

The container is running version of that image.

Starting up our first container

$  docker container run --publish 80:80 nginx

Starting up a container in the background

$  docker container run --publish 80:80 --detach nginx

Listing all the running containers

$  docker container ls

Listing all the running/not running containers

$  docker container ls -a

Docker RUN vs. START

$  docker container run always starts a new container

$  docker container start starts an existing stopped one

To give a name to containers

$  docker container run --publish 80:80 --detach --name <container-name> nginx

If we are running container in detached mode, this is how you can check the logs generated by your container while running nginx server

$  docker container logs <container-name>

We can also run commands inside docker a below

$  docker container top <container-name>

$  docker container ls <container-name>

Once you are done with testing our containers, we can remove them all by running below command

$  docker container rm <container-id> <2nd-container-id>

The above command will give you an error if you're trying to delete the running containers. To delete running container use -f attribute.

To pass Environment variables to containers use --env or -e