A Curated Collection of Writings, Research, and Solutions
Learn how a container filesystem works, from image layers and overlay2 to rootfs mounting, volumes, VFS abstraction, and runtime security controls for predictable, isolated workloads.
Learn what build images are, how pulling vs building works, how to write Dockerfiles, use multi stage builds, optimise layers, build multi arch images and secure builds.
Learn what a Docker base image is, how to create and maintain it, explore examples like Debian, Alpine, and RHEL UBI, understand derived and parent images, and optimize container security and deployments.
Learn the exact difference between Docker images and containers, how they work together in the Docker lifecycle, which commands to use, and when to choose each for modern DevOps and Kubernetes.
See a real-world software bill of materials example for a containerized microservice, showing how SBOMs list components, versions, and suppliers to speed vulnerability checks
Learn what Kubernetes (K8s) is, how it works, its core architecture and components, how it uses containers and Docker, key use cases, cloud-native and DevOps roles, plus the main benefits, limitations, and FAQs.
Learn how to write, scan, and troubleshoot Dockerfiles, follow best practices, and use Docker to run your own private containers efficiently.
Learn what a container's runtime is, how it differs from a container engine, and how it works under the hood. Explore runtime types like runc and crun, Kubernetes CRI integration, image scanning vs runtime security, OCI standards, signatures, SBOMs, and hardening best practices.
Learn how container registries store, manage, and secure container images, enabling efficient deployments, CI/CD integration, and cloud-native workflows.
Containerization - Definition, OS-level virtualization, how containers work, Docker and Kubernetes, benefits, DevOps/CI/CD alignment, cloud and hybrid multi-cloud usage, key technologies, use cases, and a concise how-to.
Learn what about container images, how they differ from containers, and how to build, store, deploy, pull, authenticate, and secure them. Covers composition, lifecycle management, Kubernetes pulls, examples, and troubleshooting.
Learn what container orchestration is, how it works, and its core components. Compare Docker vs orchestration, explore Kubernetes based design, common use cases, best tools, cloud platforms, and FAQs for real world teams.
Learn what container security is and how it works across the container lifecycle. Covers best practices, tools, image security and scanning, registries, networks, threat detection, results, and standards.
Learn what a container is, how it works, and how the Application Client Container works in enterprise Java. Covers portability, consistency, efficiency, fast startup, and isolation.
Understand how Kubernetes maps command a container’s ENTRYPOINT and args to CMD, how Pod specs override image defaults, and what this means for container startup behavior, argument passing, and consistent deployments.
Learn how Linux Cgroups group processes into hierarchies, enforce CPU, memory, and IO limits, power Docker, Kubernetes, and systemd, and help you monitor, tune, and troubleshoot resource usage safely.
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