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Installing Docker on Ubuntu
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How To Install Docker On Ubuntu

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In this article, the use and necessity of docker is highlighted. We will also explain how to install Docker on Ubuntu.

What is Docker?

Docker is a platform in which the services of resources are provided to the client to reduce the friction that occurs while deploying it on different machines. Docker provides the flexibility to have the installation of the libraries and dependencies of the instance to be easier. The most awarding thing about using Docker is that it is highly portable. Portable in a sense, the software can be developed on the docker’s service container and work perfectly fine without modifying the code or having to prepare the environment in isolation.
docker

How does it work?

Docker has the power to create different containers with various resources assigned like the memory, CPU, and OS distribution. These containers are entirely separated from each other and independent. These virtual containers can be provided as services to the clients that allow quick delivery and a higher level of quality of the application being shipped. Docker is the best approach to allow you to separate the art of developing and the machine required to develop. Many developers have faced the issue of creating software that works well on their machine but an entirely different story when deployed on a customer’s computer.

Is docker a virtual machine?

Most people confuse Docker as a virtual machine. Docker is a containerized technology that uses the concept of creating separable holders and doesn’t require a hypervisor like VirtualBox running. A virtual machine uses both the kernel and user-level threads and requires a virtual hypervisor to run in the back to support the simulation.

How to install Docker in Ubuntu

Step 1: you need to update your package manager in Ubuntu.

For that type the following command.

sudo apt-get update
update package

Step 2: Remove Docker

Now you have to make sure you don’t have a previous version of  Docker installed on your PC. For that run the following command to remove Docker if there is any.
sudo apt-get remove docker docker-engine docker.io
remove docker engine
Press ‘y’

Step 3:Install Docker

Finally safe to install Docker in Ubuntu, run the following command to install it.
sudo apt install docker.io
install docker

Step 4: Start Docker

 Once the installation has been completed you need to start the Docker and enable it for further use. Execute the following command to do so.
sudo systemctl start docker
sudo systemctl enable docker
start-enable docker

Step 5: Docker Version

Finally, check the version installed in your Ubuntu and you are good to go.
docker --version
docker version
here are a few additional commands that will help you to install Docker through alternatives.

To Install Latest Version of Docker

To install the latest version of docker, run the following command.
sudo apt-get install docker-ce
enable docker

To Install Specific Version of Docker

You can directly install the required version or you can list down the available versions and choose from them

apt-cache madison docker-ce

After selecting the version of choice type in the following command

sudo apt-get install docker-ce={version}

Conclusion

Docker can be installed in Ubuntu by following some easy commands and downloading through the package manager. Docker is very famous for container services and is establishing a name in the world of technical service. Click here for more details.

If you are sucessfully  install docker you need to Know docker essential commands 

https://www.codeleaks.io/docker-and-essentials-commands/