Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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Grafana Loki Tutorial 2026: Centralize Linux and Docker Logs Without Elasticsearch
Grafana Loki tutorial 2026: deploy Loki with Docker Compose, ship Linux syslog and Docker container logs with Promtail, query with LogQL, and build Grafana dashboards. 10x cheaper than Elasticsearch.
Hashcat Bcrypt Benchmark 2026: RTX 5090, RTX 4090, RX 7900 XTX Speed Table (Mode 3200)
Hashcat bcrypt (mode 3200) benchmark table 2026. RTX 5090: ~250 kH/s, RTX 4090: 180 kH/s at cost factor 5. RTX 3090, RX 7900 XTX speeds included. How to run hashcat -b -m 3200 yourself.
iw Command Guide 2026: Enable Monitor Mode, Scan Networks, Fix Device Busy Error
Complete iw command guide 2026. Enable monitor mode with iw dev wlan0 set type monitor, scan networks, fix "SET failed on device wlan0: Device or resource busy" error. Kali Linux and Ubuntu tested.
K3s Tutorial 2026: Lightweight Kubernetes for Raspberry Pi, Edge, and Home Lab
K3s tutorial 2026: install K3s on Linux or Raspberry Pi, add worker nodes, deploy apps, configure Traefik ingress, set up persistent storage, and compare K3s vs K8s vs MicroK8s vs k0s. Under 100MB binary.
Metasploit Framework Tutorial 2026: Ethical Penetration Testing for Beginners
Metasploit tutorial 2026: start msfconsole, search and use exploits, generate payloads with msfvenom, catch Meterpreter sessions, run post-exploitation modules. Legal practice on Metasploitable3 — step by step.
nessuscli fetch --reset: Complete Command Reference (2026)
Complete nessuscli fetch command reference 2026. Run nessuscli fetch --reset to reset your Nessus license. Covers --check, --deactivate, --unregister flags, nessus.license path (/opt/nessus/var/nessus), and troubleshooting fetch errors on Ubuntu and Kali Linux.
Next.js 15 Tutorial 2026: App Router, Server Components, Server Actions, and Prisma
Next.js 15 tutorial 2026: build a full-stack app with App Router, React Server Components, Server Actions for forms, NextAuth for authentication, and Prisma with PostgreSQL. Step-by-step with TypeScript.
OpenTelemetry Python Tutorial 2026: Distributed Tracing, Custom Spans, and Context Propagation
OpenTelemetry Python tutorial 2026: auto-instrument FastAPI with OTel SDK, create custom spans, propagate trace context across microservices, export to Jaeger or any OTLP backend. Production-ready tracing patterns.
Platform Engineering with Backstage 2026: Build an Internal Developer Platform from Scratch
Backstage tutorial 2026: install Backstage, add a software catalog, create scaffold templates for new services, integrate GitHub Actions and Kubernetes plugins. Build an internal developer platform step by step.
Playwright Python Tutorial 2026: Web Scraping, Browser Automation, and pytest Testing
Playwright Python tutorial 2026: install playwright, scrape JavaScript-rendered pages, automate browser actions, write pytest tests, intercept network requests, run headless in Docker. Beats Selenium in every benchmark.