docker pull: pull the image from the docker hubdocker ps: list the running containersdocker ps -a: list the running and stopped containersdocker start start the containerdocker stop: stop the one or more running containersdocker restart: restart the containerdocker rm: remove the containerdocker exec: runs a new command in a running containerdocker image: show all imagedocker info: show the information about docker installationdocker kill: kill one or more running containersdocker login: login into docker register

CMD: Default parameters can be override from the Command Line Interface when container is runningENTRYPOINT: Default parameters cannot be override from the Command Line Interface when Container running

FROM: specify the valid docker image name, LABEL: metadata infomation to the image, ADD: copy files, directories and remote URL files to the destination, RUN: executes any command, WORKDIR: set the working directory, ENV: set environment variables with key and value, COPY: copy files, directories and remote URL files to the destination, MAINTAINER: author who create the docker image

Docker follows Client-Server architecture. Docker having three main components Docker Client, Docker Host, and Docker Registry.Docker Client: Docker client uses REST APIs to communicate with the Docker server when the client send commands to the server, server receives commands in the form of REST APIs request.Docker Host: Docker Host is used to provide an environment to execute and run applications. It contains the docker daemon, images, containers, networks, and storage.Docker Registry: Docker Registry manages and stores the docker images

docker exec executes a new command or create a new process in the container. while docker attach just connects the standard input or output or error to a running container using the container ID or name

Stop: The docker stop command stop one or more running containers, By sending “SIGTERM” signal inside the container and stop the processKill: The docker kill command kill one or more running containers, By sending “SIGKILL” signal inside the container and kill the process immediately

Pause: The docker pause command suspends all processes in the specified containers. when suspending a process the SIGSTOP signal is used, which is observable by the process being suspendedUnpause: The docker unpause command unsuspends all processes in the specified containers.