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What it is: SadServers gives you a broken Linux box in the browser and a problem statement. Disk full, service will not start, mystery process eating CPU. You fix it.
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Kargo
Stop Scripting Promotions. Start Shipping with Kargo. Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now.
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What it is: DevOps Daily is an independent site with written guides, interactive simulators and quizzes, plus tool comparisons for the parts of the stack where the choice actually matters.
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container.training
Slides and code samples for training, tutorials, and workshops about Docker, containers, and Kubernetes.
What it is: container.training, Jérôme Petazzoni's complete Docker and Kubernetes courseware. Full slide decks, exercises and instructor notes, free, from someone who was at Docker early.
