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What Is “GitOps” and Why Does It Matter?

GitOps is an approach to infrastructure that takes the best practices of software development and applies them to IT systems. GitOps builds upon the Infrastructure as Code model to create an automated infrastructure model tha…

How Linux Runlevels Affect Running Services

Linux runlevels distinguish between system operating states. Switching runlevel will change the services which are running. You can customise runlevels so each level starts with a specific set of services….

How and Why to Use A Remote Docker Host

The docker CLI program is independent of the Docker daemon which runs your containers. Although both components usually run on your local machine, you can run docker commands against a remote Docker host….

How to Run MySQL In A Docker Container

Docker containers let you quickly spin up new applications without polluting your system with dependencies. A MySQL database is a common requirement for web-based software. Here’s how to get a new MySQL instance running in Do…

How to Install Docker and Docker Compose on Linux

Docker gives you everything you need to build and run containers on your Linux system. Containers are similar to lightweight virtual machines. They let you create portable application images which run using your host’s operat…

How to Monitor Docker Container Logs

Docker automatically aggregates container standard output and error streams (stdout/stderr) into log feeds which are retained by the Docker daemon. You can easily monitor logs to understand what’s going on in your containers….

Understanding Docker’s “latest” Tag

Docker tags are used to identify images by name. Each image can have multiple tags assigned. Tags look similar to my-image:latest, with the part before the colon defining the image name and the latter section specifying the v…

How to Assess Docker Engine Security

Docker lets software developers and DevOps engineers rapidly package applications for production. Docker containers operate largely independently of their host but aren’t impervious to security threats. Here’s how to audit yo…

How to Use React Contexts to Manage State

React contexts are a feature which help you eliminate repetitive prop drilling. Props are often passed down from a parent component to a deeply nested child. This requires each intermediary component to “forward” the prop to …

What’s New In Node.js 16?

Node.js has launched its latest major version. Released in April 2021, v16 is the new “current” release. In October 2021, it will be promoted to the Long Term Support (LTS) release with maintenance continuing into 2024….

What Is A Progressive Web App (PWA)?

Progressive Web Apps (PWAs) are websites that use a collection of modern web technologies to provide app-like user experiences. Typical PWA features include offline support, background sync and the ability to “install” the si…
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