Docker Commands

1.docker –version

This command is used to get the currently installed version of docker

2.docker pull

docker pull - This command is used to pull images from the docker repository(hub.docker.com)

3.docker run

Usage: docker run -it -d - This command is used to create a container from an image

4.docker ps

This command is used to list the running containers

5.docker ps -a

This command is used to show all the running and exited containers

6.docker exec

docker exec -it bash - This command is used to access the running container

7.docker stop

docker stop - This command stops a running container

8.docker kill

docker kill - This command kills the container by stopping its execution immediately. The difference between ‘docker kill’ and ‘docker stop’ is that ‘docker stop’ gives the container time to shutdown gracefully, in situations when it is taking too much time for getting the container to stop, one can opt to kill it

9.docker commit

docker commit - This command creates a new image of an edited container on the local system

10.docker login

This command is used to login to the docker hub repository

11.docker push

docker push - This command is used to push an image to the docker hub repository

12.docker images

This command lists all the locally stored docker images

13.docker rm

docker rm - This command is used to delete a stopped container

14.docker rmi

docker rmi - This command is used to delete an image from local storage

15.docker build

docker build - This command is used to build an image from a specified docker file

Docker Php Application Example

A Dockerfile is a text document that contains commands that are used to assemble an image

1.Create a directory

mkdir php-docker-app

2.Create a Php File

<?php  
    echo ?Hello, Php?;  
?>  

3.Create a DockerFile

FROM php:7.0-apache  
COPY . /var/www/php  

4.Create Docker Image

docker build -t php-docker-app .

Which will create the docker image

5.Run the Docker image

docker run php-docker-app

We can see that our docker image is running and output is shown to the browser. This image is running on the local host.