CORE GUIDES

Practical guides, tutorials & best practices

Complete knowledge base for IT professionals. Manuals, checklists, comparisons and guides — from security to AI/ML.

653

ARTICLES

Container Orchestration Patterns

Design patterns for container orchestration. Sidecar, Ambassador, Adapter, Init Container and more.

aiintermediate09. 10. 2025

How to Build a Developer Portfolio

How to create a portfolio that helps you get a job — projects, design, content.

aiintermediate08. 10. 2025

10 Bash Tricks That Will Save You Hours of Work

10 practical bash tricks — history search, brace expansion, process substitution. Save hours daily.

aiintermediate08. 10. 2025

OWASP Top 10: Identification and Authentication Failures

Secure authentication — session management, MFA, protection against credential stuffing.

aiintermediate07. 10. 2025

BuildKit — Modern Docker Build Engine

BuildKit as next-gen build engine. Parallel builds, cache mount, secret mount and multi-platform builds.

devopsintermediate05. 10. 2025

Jenkins Pipeline

Jenkins Declarative Pipeline. Stages, agents, post actions.

aiintermediate03. 10. 2025

Attention Mechanism — The Key to Modern AI

Discover the attention mechanism — the revolutionary technology that changed artificial intelligence. Understand how...

aiintermediate02. 10. 2025

AutoGen Tutorial

Learn to build intelligent agents with the AutoGen framework. A complete tutorial for working with LLM agents, their...

developmentadvanced02. 10. 2025

Zero Trust Identity — Identity-Centric Security Model

Zero Trust Identity approach to security. Continuous verification, device trust, conditional access policies and...

dataintermediate01. 10. 2025

How to Scale an Application from 0 to 1M Users

Progressive web application scaling — from a single server to a million users.

architectureintermediate30. 09. 2025

Microservices Checklist

Checklist for microservices architecture — boundaries, communication, observability.

aiintermediate30. 09. 2025

Disk Management — LVM and ZFS

Disk management — partitioning, LVM, ZFS and monitoring.

aiintermediate29. 09. 2025

Docker Security Checklist

Docker security checklist — image scanning, non-root, read-only filesystem.

aiintermediate29. 09. 2025

Flutter Platform Channels — Native Integration for iOS and Android

How to communicate with native code from Flutter via Platform Channels. Method channels, event channels, Pigeon code...

aiintermediate28. 09. 2025

Progressive Delivery

Gradual deployment. Canary, feature flags, automated rollback.

aiintermediate28. 09. 2025

Password Hashing — bcrypt, Argon2

How to properly hash passwords. Comparison of bcrypt, Argon2id, scrypt.

cloudintermediate26. 09. 2025

Multi-Cloud Strategy — When and How

Multi-cloud architecture, vendor lock-in, abstraction layers, and real trade-offs.

aiintermediate26. 09. 2025

10 Most Common Junior Developer Mistakes

10 mistakes every junior developer makes — and how to avoid them.

infrastructureintermediate26. 09. 2025

DDoS Protection — How to Defend

Types of DDoS attacks, mitigation, CDN, rate limiting, Cloudflare.

dataintermediate25. 09. 2025

Lakehouse Architecture — Merging Data Lake and Warehouse

Lakehouse combines the flexibility of a data lake with the reliability of a warehouse. Medallion architecture.

dataintermediate24. 09. 2025

Parquet, Avro, ORC — Serialization Formats for Data Engineering

Comparison of data formats Parquet, Avro, ORC and JSON. When to use which in data pipeline.

developmentintermediate23. 09. 2025

React Native Performance — Optimization for 60 FPS

How to achieve 60 FPS in React Native applications. FlashList, memo optimizations, Reanimated, bridge overhead, and...

securityintermediate23. 09. 2025

Nmap Tutorial — Network Scanning

A complete guide to Nmap. Port scanning, service detection, scripting engine.

aiintermediate22. 09. 2025

OWASP Top 10: Security Logging and Monitoring Failures

How to properly log security events and detect attacks.

aiintermediate19. 09. 2025

Chain-of-Thought Prompting

Discover Chain-of-Thought prompting — a technique that teaches AI models to solve complex problems step by step....

infrastructureintermediate19. 09. 2025

Load Balancing Algorithms

Round Robin, Least Connections, Consistent Hashing a konfigurace v Nginx.

aiintermediate17. 09. 2025

Database Migrations

How to manage database schema. Alembic, Flyway, Prisma migrations.

aiintermediate17. 09. 2025

gRPC Service in Go

How to build a gRPC service in Go. Protobuf, streaming, interceptors.

dataintermediate17. 09. 2025

MongoDB vs PostgreSQL

Document vs relational database — when to choose which.

cloudintermediate16. 09. 2025

Kubernetes — Stateful Workloads in Practice

Running stateful applications on Kubernetes. Databases, message brokers, storage classes and data persistence.

cloudintermediate16. 09. 2025

Traefik Tutorial

Service auto-discovery, Docker/K8s integration, Let's Encrypt.

aiintermediate15. 09. 2025

Error Budget

Error budget concept in SRE. Balancing reliability and speed.

developmentintermediate15. 09. 2025

pip vs poetry vs uv — Python Dependency Management

Comparison of Python package managers. When to use which.

cloudintermediate14. 09. 2025

Network Policies in Kubernetes

How to isolate pods in Kubernetes. Ingress, egress rules.

aiintermediate12. 09. 2025

Docker Multi-stage Builds

Optimizing Docker images with multi-stage builds. Smaller images, faster deploys, more secure containers.

cloudintermediate11. 09. 2025

Azure AKS — Managed Kubernetes

Azure Kubernetes Service. Node pools, Azure CNI, Workload Identity and monitoring.

aiintermediate11. 09. 2025

How to Build a Home Lab

A guide to building a home lab — hardware, OS, services, networking.

aiintermediate10. 09. 2025

Chunking Strategies for RAG

Discover effective chunking strategies for RAG systems. Learn to optimally split text for better retrieval and...

cloudintermediate10. 09. 2025

Flux CD Tutorial

GitOps with Flux. Automatic synchronization, image automation and Helm releases.

aiintermediate10. 09. 2025

WebSocket vs SSE vs Long Polling

Real-time communication technologies — comparison.

dataintermediate07. 09. 2025

The Complete Guide to Elasticsearch

Elasticsearch — full-text search, agregace, logging, monitoring.

cloudintermediate05. 09. 2025

CI/CD for Kubernetes — Pipeline Design

Build, test, scan, push, deploy. GitHub Actions + ArgoCD.

aiintermediate05. 09. 2025

Password Manager: A Complete Guide

Why and how to use a password manager — Bitwarden, 1Password, KeePass.

aiintermediate05. 09. 2025

DNS — How Domain Name Resolution Works

Complete DNS explanation — hierarchy, record types, resolving, and DNSSEC.

aiintermediate04. 09. 2025

Chaos Engineering — Advanced Techniques

Advanced chaos engineering experiments. Litmus, Chaos Mesh, steady state hypothesis and blast radius.

aiintermediate04. 09. 2025

VPN Overview — WireGuard, OpenVPN, Tailscale

WireGuard for performance, OpenVPN for compatibility, Tailscale for simplicity.

observabilityintermediate04. 09. 2025

How to Deploy OpenTelemetry in Kubernetes

Step-by-step guide to deploying OpenTelemetry Collector in a Kubernetes cluster with export to the Grafana stack.

aiintermediate03. 09. 2025

SOLID Principles in Practice

5 OOP design principles with practical examples in Python.

aiintermediate02. 09. 2025

New project setup checklist

Checklist pro setup newho projektu — repo, CI/CD, monitoring, documentation.

cloudintermediate01. 09. 2025

Cloud Disaster Recovery — Strategies

DR strategies, RTO/RPO, multi-region setup and testing.