Docker client: it is used to communicate with the docker server (dockerd) Docker server: it contains dockerd and containerDocker image: A Docker image is a template written in YAML that contains instructions for the Docker container.Docker registry: The Docker registry is where you would host various types of images and where you would distribute the images from.Docker container: Docker container is an executable package of applications and its dependencies bundled together.

Components of Docker and its Brief SummaryDocker client and serverThe Docker client talks to the Docker daemon, which does the heavy lifting of building, running, and distributing your Docker containers. The Docker client and daemon can run on the same system, or you can connect a Docker client to a remote Docker daemon. Docker imageA Docker image is a file used to execute code in a Docker container. Docker images act as a set of instructions to build a Docker

List of 20 docker commands and its use cases with example?Docker versionWe usually start by finding the installed version of docker that we are working on. Docker searchThe “docker search” command searches for specific images through the Docker hub. This command returns the specific information, including image name, description, automated, official stars, etc. Docker pullAs the name suggests, this command pulls a specific image from the Docker Hub. All you have to do is use the command ‘docker pull’ along

What is the differenet between CMD vs Entrypoint?CMD commands are ignored by Daemon when there are parameters stated within the docker run command.ENTRYPOINT instructions are not ignored but instead are appended as command line parameters by treating those as arguments of the command.

List of dockerfile instructions and its Brief Summary?FROM: Create a basic image like httpd.RUN: It is to build the containerMAINTAINER: Creates the images.ENV: Environment for image.COPY: Copies the file to images.

What is the differenet between docker exec and attach?Docker exec executes new command or create a new process in containerDocker attach conncects the standard input/output/error of main process inside the container.

What is the differenet between docker stop and kill?Docker stop command stop a running container by sending SIGTERM signal to the root (PID 1) in container.Docker kill command kills one or more containers.

What is the differenet between docker pause and unpause?Pause is to stop the process running inside containersUnpause is to resume the paused process inside containers

Components of Docker and its Brief SummaryDocker client – Docker user to communicate with DockerDocker host – It Consists of dockerd(daemon),containers and imagesRegistry – It stores images where we can use docker pull to pull images from registry.

1.docker –version: This command helps you know the installed version of the docker software on your system. 2.docker pull nginx: This command helps you pull images from the central docker repository. 3.docker images: This command helps you in listing all the docker images, downloaded on your system. 4.docker run –it -d centos: This command helps in running containers, from their image name. -It = which basically makes the terminal interactive. -d = which means run the container as a daemon

The format of Dockerfile is similar to the below syntax: # Comment INSTRUCTION arguments A Dockerfile must start with a FROM instruction. There are multiple INSTRUCTIONS that are available in Dockerfile, some of these include: FROM RUN CMD LABEL EXPOSE FROM: The FROM instruction specifies the Base Image from which you are building. RUN: In this we can run our commands for installing the packages ADD: This instruction will give the output of converting tar file in to normal file

Docker Exec: The docker container exec command runs a new command in a running container. The command started using docker exec only runs while the container’s primary process (PID 1) is running, and it is not restarted if the container is restarted. docker exec [OPTIONS] CONTAINER COMMAND [ARG…] Docker attach: When we start a docker container, we need to decide if we want to run in a default foreground mode or the detached mode. It will attach local standard input,

Docker Stop: This command will stop the containers which are running. docker stop [container id or name] Docker Kill: This command will kill the container by stopping its execution immediately. docker kill [container id or name] The difference between ‘docker kill’ and ‘docker stop’ gives the container time to shutdown in any situations, when it is taking too much time for getting the container to stop, one can opt to kill it.

Docker exec: it is basically use to run a command in a running container docker exec [OPTIONS] CONTAINER COMMAND [ARG…] Docker attach: Attach local standard input, output, and error streams to a running container docker attach [OPTIONS] CONTAINER

Docker stop : Stop one or more running containers docker stop [OPTIONS] CONTAINER [CONTAINER…] Docker kill: kill the container which sends signals docker kill [OPTIONS] CONTAINER [CONTAINER…]

DOCKER PAUSE: It will suspends all processes in the specified containers. It means that the processes in the container stop running, and they are be able to resumed later. docker pause [container id or name] DOCKER UNPAUSE: It will resumes all the processes in the specified container. It means recovery container all processes. docker unpause [container id or name]

Docker Pause: Pause all processes within one or more containers docker pause CONTAINER [CONTAINER…] Docker Unpause: Unpause all processes within one or more containers docker unpause CONTAINER [CONTAINER…]

the four main components of docker are: Docker client and server  Docker image  Docker registry  Docker container  Docker client and server: The communication between the Docker client and the Docker host is via a REST API. Docker image: A Docker image is a template that contains instructions for the Docker container. That template is written in a language called YAML, which stands for Yet Another Markup Language. Docker registry: The Docker registry is where you would host various types of

1. docker -version This command is used to get the currently installed version of docker 2. docker pull This command is used to pull images from the docker repository(hub.docker.com) 3. docker create This command is used to create container from an image 4. docker start This command is used to start the container 5. docker run This command is used to create and run a container from an image 6. docker ps This command is used to list the running containers

DOCKER: It is the world’s leading software container technology which is used for creating and managing containers.Docker is an open platform, once we build a docker container, we can run it anywhere, say it windows, Linux, mac whether on a laptop, data center, or in the cloud.The whole idea of docker is for developers to easily develop applications, ship them into containers which can then be deployed anywhere. The Docker components are divided into two categories; a)Basic b) Advanced a)Basic