mini-learn - Docker / Engine

You may have heard of Docker, and this question might have come to you earlier about what this technology does and why it has become so popular. Docker is an open-source platform for automating and containerizing software deployments. Simply put, Docker provides you with the ability to run your applications independently from the host environment. This means less worry for maintaining different versions of operating systems or libraries.

With Docker, you can create an image from your applications and then run it on any operating system where Docker is installed. This is precisely why developers and system administrators are leaning toward Docker, as they can run their applications in an isolated environment, distinct from the remaining systems. In fact, Docker gives us the freedom to easily bundle our software and run it anywhere we need.

It might be interesting for you to know that the Docker engine itself functions as a software that performs the necessary tasks for managing containers and images. This engine allows you to easily create, run, and manage containers. For this reason, when we talk about Docker, we often refer to its engine. The Docker engine is responsible for the main orchestration and communication with the operating system.

Next, let’s take a look at the installation method and the orchestration of Docker, along with some important commands. An interesting point is that using Docker is quite simple, and even new users can benefit from it. Now let’s start with a straightforward example.

Installing Docker

# For installing Docker on various operating systems, you can use the command below:
sudo apt-get install docker.io

# After installation, you can start the Docker service:
sudo systemctl start docker

# And to ensure a correct installation, you can use the command below:
sudo docker --version

Command Explanations