How to download and remove Docker Image and use Docker container on CentOS and RHEL 6/7 and Ubuntu 16.04 step by step guide

Download Docker Image from the Docker Hub and Docker Remove Image | In this article we will learn how to download docker image and after downloading the image start and run docker container and play with docker container to run and deploy an application and how to remove docker image.

How to download Docker Image

We can download Docker Image from the Docker Hub on your linux system using the below command. Suppose we are going to download centos image first we need to search the available images into the central docker repo using the below command.

[root@localhost ~]# docker search centos

How to download Docker Image and use Docker container on CentOS and RHEL 6/7 step by step guide

Once getting the available images we can download the image using the below command.

[root@localhost ~]# docker pull centos

latest: Pulling from centos

e4b082fc6cdb: Pull complete

f016d310caa9: Pull complete

ab9a80ab07d0: Pull complete

Digest: sha256:38777a4106f0072649128ea4236241345a3ed21c55abbbd53bad5342549f6126

Status: Downloaded newer image for centos:latest

To list the available docker images we can execute the below command.

[root@localhost ~]# docker images

REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE

centos latest ab9a80ab07d0 6 weeks ago 201.8 MB

Docker Remove Image

If you want to remove docker image you can execute the below command.

[root@localhost ~]# docker rmi centos

If you want to remove docker image force fully then you need to use the below command.

[root@localhost ~]# docker rmi -f ab9a80ab07d0

How To Use Docker Container

After downloaded the image we can start and run the docker container. We can run the container using the below command. In this below command run the container using the downloaded image and get the downloaded centos release version.

[root@localhost ~]# docker run centos cat /etc/centos-release

CentOS Linux release 7.6.1810 (Core)

After running the docker container we need to know container id which is very useful to start and stop the container as well as you can use container name also to start and stop the container.

[root@localhost ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

a4d4d2937780 centos "cat /etc/centos-rel About a minute ago Exited (0) About a minute ago sick_yalow

And you can start the container again using the below command.

[root@localhost ~]# docker start <container ID>

How To Run interactive session for docker container

To run interactive session for a docker container we can use the below command.

[root@localhost ~]# docker run –it centos bash

If you type exit into the shell the container will be stop and if you don’t want to stop container process you can press ctrl+p and ctrl+q at a time.

You can attach the container using the below command

[root@localhost ~]# docker attach <container id>

You can check the container process using the below command.

[root@localhost ~]# docker ps

That’s all.If this article is helpful to know about Download Docker Image from the Docker Hub and Docker Remove Image please share it!