Expert tutorials, guides, and tips on Linux, DevOps, and IT Administration
A focused, eight-volume curriculum that teaches absolute beginners the Linux skills that actually matter — the command line, files, scripts, packages, networking, monitoring, security, and the daily work of administration. One volume per concept, in order, with no jargon and no detours....
A practical, opinionated 2026 roadmap to take you from "I have never opened a terminal" to "I run hardened Linux servers in production." Eight books, three stages, one straight line — and a study schedule you can actually finish in twelve weeks....
Explore the complete Dargslan open-source IT ecosystem: 120 Linux PyPI packages, 119 Windows Python CLI tools, 120 PowerShell modules on PSGallery, and organized GitHub repositories. Free, professional-grade tools for sysadmins, DevOps engineers, and cybersecurity professionals....
Python 3.13 ships an experimental free-threaded build that finally removes the GIL. The marketing is exciting; the reality is more nuanced. We benchmarked free-threaded Python on a representative range of workloads — CPU-bound, I/O-bound, mixed — and measured the single-threaded slowdown that nobody talks about. Here is what to actually expect in 2026, and when free-threaded mode is ready for production use....
BuildKit, Buildah, and Kaniko are the three serious container build tools in 2026. They overlap heavily but differ in operational model, security guarantees, and CI ergonomics. This honest comparison walks through real benchmarks, the rootless story, secrets handling, OCI image features, and which tool fits which workflow — so you can pick once and not regret it six months later....
Kubernetes 1.31 is one of the more disruptive recent releases — removed in-tree volume plugins, AppArmor going GA, structured authentication maturing, and several long-deprecated APIs finally going away. This is a battle-tested upgrade guide for production clusters: what breaks, what to test on staging, and a safe step-by-step migration path that does not page you at 2 AM....
Zero Trust is no longer a buzzword — by 2026 it is the default architecture for serious infrastructure. This practical guide shows Linux sysadmins and DevOps engineers how to actually implement Zero Trust on real servers: identity-aware proxies, mTLS everywhere, SPIFFE/SPIRE for workload identity, eBPF for runtime enforcement, and a phased rollout that does not break production on day one....
Linux Kernel 6.10 ships with bcachefs going production-ready, the sched_ext pluggable scheduler, faster io_uring, and tightened security defaults. Here is what every sysadmin and DevOps engineer needs to know before rolling it out in 2026 — what changed, what broke, and what to test on staging first....
AWS Graviton4 has matured to the point where ARM on EC2 is the default recommendation for most new workloads — but not all of them. We benchmarked Graviton4 against the latest x86 instances on real workloads (PostgreSQL, Redis, Java services, Python web apps, ML inference), measured the actual cost savings, and documented the migration gotchas that still trip teams up. Here is when ARM saves you money in 2026, and when sticking with x86 is the right call.</p>...
Discover Git & GitHub for Absolute Beginners, the definitive guide to version control. Learn Git from scratch, master branching strategies, and collaborate effectively with GitHub....
Week 4 of March 2026: major cloud pricing adjustments, open-source project milestones, new developer tools, and emerging trends in infrastructure management....
A practical guide to building a technical portfolio that impresses hiring managers. Learn what projects to include, how to present them, and strategies for standing out in the IT job market....
Welcome to the Dargslan Tech Blog — long-form, hands-on articles for engineers who run real systems in production. We publish every week on Linux administration, DevOps tooling, cloud architecture, cybersecurity, Python automation, Windows Server, and the practical day-to-day skills that separate junior sysadmins from senior platform engineers. Every post is written by working professionals, includes copy-pasteable code and configuration files, and is updated whenever upstream tools release breaking changes.
There is no shortage of tech blogs on the internet, but most fall into one of two traps: shallow listicles written by people who have never touched the tools, or 30-page corporate whitepapers designed to sell a product. Our articles sit in the middle — long enough to actually solve your problem, short enough to read with a coffee, and always grounded in working examples you can run in your own terminal. We don't write filler, we don't gate content behind email forms, and we never publish AI-generated slop without expert review.
Our writers come from a sysadmin, SRE, and DevOps background and have shipped production systems for fintech, healthcare, telco, and SaaS companies across Europe and North America. When you read a tutorial here, you're reading what someone actually did at 2am during an incident — not a sanitized vendor case study.
Subscribe to our RSS feed, follow the tech news section, or grab the daily IT tip for a steady stream of practical knowledge. If long-form learning is more your style, our companion eBook library covers every topic from this blog in 200-500 page depth, with downloadable code repositories and lifetime updates.