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A Docker container is a piece of software that provides a particular application or service in a lightweight… container. Containers are often compared to virtual machines, and they are both heavily used in cloud deployments. But they are different.

• Virtual machines run on the host system’s hypervisor, which runs on the host machine’s operating system. A virtual machine contains a complete operating system and a kernel.
• Containers contain only enough code to run that application or service. It leverages the operating system of the host system for everything else it needs. In the case of Docker, containers run on Docker Engine (also known as the Docker daemon), a platform that sits on top of the host operating system and also coordinates communications for each individual container.

As I said in my previous tutorial, I don’t have a lot of technical writing from my day job that I can share with the public and prospective employers. To mitigate this, I’ve been creating some beginner-level articles on managing WordPress on Amazon Web Services for this portfolio site. So if you have completed my Introduction to Hosting WordPress on Amazon Web Services (AWS) tutorials, here’s one about HTTPS, SSL/TLS certificates, and how you can install them on your WordPress instance running on an EC2 instance – for free!

I’ve been working for several years as a technical writer, but since almost all of my work is covered by non-disclosure agreements, I don’t have a lot to show for it. So I decided to create my own tech-writing samples on my own time. I took my WordPress experience, combined it with what I taught myself about hosting WordPress sites on Amazon Web Services (AWS), and created a six-part introduction for people who are new to running their own services in the cloud.