Sudoers Security Audit: Finding NOPASSWD Entries and Privilege Escalation Risks
The sudoers file is the single most important text file on a Linux server. A misconfigured rule is the most common path ...
Expert tutorials, guides, and tips on Linux, DevOps, and IT Administration
A complete, no-fluff walkthrough of CCNA 200-301: Complete Study Notes โ twelve exam-aligned modules, 50+ diagrams, hands-on labs, and two full practice exams that take you from networking fundamentals to exam-ready....
A focused, eight-volume curriculum that teaches absolute beginners the Linux skills that actually matter โ 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 โ and a study schedule you can actually finish in twelve weeks....
The sudoers file is the single most important text file on a Linux server. A misconfigured rule is the most common path ...
"Too many open files." Every operations engineer has stared at that error message. The Linux ulimit machinery โ and it...
"crontab -r" is the most dangerous keystroke combination in Unix. One letter from the harmless -l, it deletes your entir...
Knowing what packages were installed, upgraded, or removed -- and when -- is essential for troubleshooting, security aud...
Accurate time is critical for logging, certificates, authentication, and distributed systems. A drifting clock causes su...
PAM controls how users authenticate on Linux. A misconfigured PAM stack can lock out legitimate users or leave the door ...
A misconfigured /etc/fstab can prevent your Linux system from booting. Validating fstab entries before reboot catches mi...
Inode exhaustion is a silent killer -- your disk shows free space but no new files can be created. Monitoring inode usag...
Temp files accumulate silently in /tmp and /var/tmp until they consume significant disk space. Proactive temp file manag...
Welcome to the Dargslan Tech Blog โ 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 โ 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 โ 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.