-> docker –versionThis command is used to get the currently installed version of docker-> docker pullThis command is used to pull images from the docker repository-> docker runThis command is used to create a container from an image-> docker psThis command is used to list the running containers-> docker ps -aThis command is used to show all the running and exited containers-> docker execThis command is used to access the running container-> docker stopThis command stops a running container-> docker

The ENTRYPOINT instruction looks almost similar to the CMD instruction. However, the main highlighting difference between them is that it will not ignore any of the parameters that you have specified in the Docker run command (CLI parameters).-> CMD : Sets default parameters that can be overridden from the Docker Command Line Interface (CLI) when a container is running.-> ENTRYPOINT : Default parameters that cannot be overridden when Docker Containers run with CLI parameters.

There are multiple INSTRUCTIONS that are available in Dockerfile, some of these include: From :The FROM instruction specifies the Base Image from which you are building.RUN: In this we can run our commands for installing the packagesADD: This instruction will give the output of converting tar file in to normal file and it will add in to that particular directory.COPY: This instruction will give the output of copying the content and nothing will do more than that in the docker

-> Attach:This command to attach your terminal’s standard input, output, and error to a running container using the container’s ID or name.-> exec: The docker exec command runs a new command in a running container. execute the below command after restarting the container node API

Starting and stopping a container is not the same as starting and stopping a normal process. To terminate a container, Docker provides the docker stop and docker kill commands. Both the docker kill and docker stop commands look similar, but their internal execution is different. The docker stop commands issue the SIGTERM signal, whereas the docker kill commands sends the SIGKILL signal. The execution of the SIGTERM and SIGKILL. is different. Unlike SIGKILL, the SIGTERM gracefully terminates a process rather

-> Docker Pause :It will suspend all processes in the specified containers. It means that the processes in the container stop running, and they can resume later.-> Docker Un pause :It will resume all the processes in the specified container. It means recovery container all processes.

the docker is virtualization operating system which is mainly used for development and running application through containers which are lightweight software blocks can run application with all dependencies.-> Components of docker :1)Docker client: Whenever we are using docker commands, the client sends the commands to dockerd, which carries them out. The docker command uses the Docker API. Then the docker can communicate with more than one daemon. 2)Docker image: Docker Image is a file that contains all the necessary dependency