#infrastructure
All articles tagged #infrastructure — practical guides from production experience.
Browse by category
Filter by topic
52 posts tagged #infrastructure · page 5 of 6
ps Command Linux: The Engineer's Troubleshooting Guide
How to use the ps command on Linux to debug high CPU, memory leaks, zombie processes, and unresponsive services — with real production workflows, common mistakes, and a quick-reference cheat sheet.
NGINX Troubleshooting Guide: Complete Production Reference
The complete NGINX troubleshooting reference — 502/504 errors, upstream failures, SSL issues, connection limits, keepalive misconfiguration, and production debugging workflows with real commands.
Linux Security Hardening Guide: CIS Benchmarks for Production
Complete Linux security hardening guide using CIS benchmarks — Ubuntu, RHEL, and Windows Server. SSH hardening, auditd, filesystem restrictions, firewall configuration, and production pitfalls to avoid.
Linux Process States Explained: R, S, D, Z and What They Mean for Troubleshooting
A practical guide to Linux process states — R, S, D, Z, T — what each means, how to read them in ps and top, why D state can freeze a system, and how to handle zombie processes in production.
Linux Performance Troubleshooting: Complete Engineer's Guide
The complete guide to Linux performance troubleshooting — CPU, memory, disk I/O, process states, and network — with step-by-step workflows, real production scenarios, and links to deep-dive articles on every topic.
Linux Memory Leak Troubleshooting: RSS vs VSZ Explained
How to troubleshoot memory leaks on Linux — understanding RSS vs VSZ, tracking memory growth over time, identifying the leaking process, and real debugging steps from production systems.
Linux High CPU Usage: Step-by-Step Troubleshooting Guide
Step-by-step guide to diagnosing Linux high CPU usage — using ps, top, and htop to identify the culprit, distinguish user vs kernel vs I/O wait CPU, and resolve the issue in production.
Top Linux Debugging Tools Every Engineer Should Know
The essential Linux debugging tools for production troubleshooting — ps, top, htop, lsof, strace, iotop, vmstat, dmesg, and more — with real use cases and a comparison table.
CIS RHEL Level 1 Hardening: What Actually Breaks in Production
CIS RHEL Level 1 hardening guide for production Red Hat systems — what breaks, what to apply first, and how to avoid SSH lockouts, auditd disk exhaustion, and PAM-related service outages.