Docker pause is used to pause or suspend a running container or containers depending on the input. This puts a pause on all running operation happening at that instance. Docker unpause simply resumes the operations in the container.

A docker consists of      Docker client which puts up the request for the client in order to perform a request.      Docker host which contains the docker daemon. The requests which are put up by the client are processed here i.e containers are created and images are pulled from docker registry/hub. Docker registry is the place where the different apps images are stored. These images are pulled to the host where they are processed by creating a container.

Docker psThis command is used to list all the running containers in the background. Docker ps -aThis command is used to know the details of all the running, stopped, or exited containers. Docker versionWe usually start by finding the installed version of docker that we are working on. 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 with the name of the

CMD InstructionYou can set default commands with parameters using the CMD instruction. If you run a Docker container without specifying any additional CLI commands, the CMD instruction will be executed. You can include an executable as the default command. However, if you choose to omit it, you will have to specify an ENTRYPOINT instruction along with the CMD instruction If you have specified an argument along with the Docker run command, the default one specified using the CMD instruction will

FROM: Create a basic image like httpd. RUN: It is to build the container MAINTAINER: Creates the images. ENV: Environment for image. COPY: Copies the file to images.

Docker attachThis command to attach your terminal’s standard input, output, and error (or any combination of the three) to a running container using the container’s ID or name. attach the running container with the following command. you need to press enter once execute the below command, docker is waiting for your input. docker attach nodeapi once attached, you can do all the cli commands like you can check the node version, run the bundle file, exit etc.. But the problem

docker stop attempts to gracefully shutdown container(s) while docker kill (by default) immediately stops/terminates them; docker stop issues a SIGTERM signal to the main process inside the container docker kill (by default) issues a SIGKILL signal. With docker kill, you may specify to send a different signal (to the main process inside the container) than the default SIGKILL signal, using the –signal flag. Same thing is not possible with the docker stop command. With docker stop, the container(s) must comply

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 Client: The first component of Docker is the client, which allows the users to communicate with Docker. Being a client-server architecture, Docker can connect to the host remotely and locally. As this component is the foremost way of interacting with Docker, it is part of the basic components. Whenever a user gives a command to Docker, this component sends the desired command to the host, which further fulfils the command using the Docker API. Docker Image: Docker images are

-> 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

docker pull – used to pull images from the docker repository(hub.docker.com) docker run – used to create a container from an image docker ps – used to list the running containers docker ps -a – used to show all the running and exited containers docker exec – used to access the running container docker stop – stops a running container docker kill – kills the container by stopping its execution immediately. docker commit – creates a new image of an

The difference between ENTRYPOINT and CMD is that, if you try to specify default arguments in the docker run command, it will not ignore the ENTRYPOINT arguments. If you have used the exec form of the ENTRYPOINT instruction, you can also set additional parameters with the help of CMD command.

 FROM command allows you to create a base image such as an operating system, a programming language, etc.  RUN instruction is used to run specified commands. You can use several RUN instructions to run different commands. CMD: If you want to run a docker container by specifying a default command that gets executed for all the containers of that image by default, you can use a CMD command. ENTRY POINT: It starts the process we want to run after starting the

Docker exec executes a new command / creates a new process in the container’s environment, while docker attach just connects the standard input/output/error of the main process(with PID 1) inside the container to the corresponding standard input/output/error of the current terminal(the terminal you are using to run the command).