Where can I learn about Jenkins, Bamboo, Azure DevOps, and GitHub Actions?

Honestly, not many are using Bamboo these days. If you're already invested in Azure DevOps and GitHub Actions, you might want to focus on those instead. GitHub has an importer tool for Bamboo, but it’s easier to manage with Git since most workflows now lean towards that. If you're not heavily reliant on Azure DevOps, I’d recommend diving into GitHub Actions instead.

The best way to truly learn is by building your own CI/CD pipeline using these tools. I suggest setting up a GitHub Actions workflow that builds and tests a container, pushes it to a registry, and deploys it to a Kubernetes cluster. This way, you'll touch on source control, pipelines, containers, and cloud—all at once. Jenkins is still relevant for older systems, so having a grasp of it is beneficial, even though GitHub Actions is more user-friendly. And yep, Bamboo is on the decline, but if you're using it, just get comfortable with the basics. For structured learning, consider Azure certifications or courses on platforms like Udemy, but be aware some of those courses can be pretty detailed if you already know the basics.