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  • AI
  • DevOps
  • HomeLab
  • Linux
  • Networking
  • Programming
  • English
    • English
    • Tiếng Việt
    • 日本語
Breakings
Programming tutorial - IT technology blog
Building a Production-Ready REST API with Spring Boot, Spring Security, JPA, and Docker
June 5, 2026
Programming tutorial - IT technology blog
Building a Laravel REST API with Docker: From Zero to Production in 2024
June 5, 2026
DevOps tutorial - IT technology blog
Mastering Prometheus Alertmanager: Routing, Grouping, Inhibition, and Smart Alert Delivery to Telegram and PagerDuty
June 5, 2026
Security tutorial - IT technology blog
Securing IoT Devices at Home and in Your HomeLab: VLAN Segmentation, Firmware Monitoring, and Blocking Suspicious Connections
June 5, 2026
Programming tutorial - IT technology blog
Mastering Protocol Buffers: Schema-first API Design for Multi-language Projects
June 5, 2026
Database tutorial - IT technology blog
Deploy FerretDB on Docker: MongoDB-Compatible Open Source Database Built on PostgreSQL
June 5, 2026
Security tutorial - IT technology blog
Practical Web Security: Hunting XSS, SQLi, and IDOR with Burp Suite Community
June 5, 2026
Security tutorial - IT technology blog
Deploy OpenCTI on Docker: Build Your Own Threat Intelligence Lab
June 5, 2026
Programming tutorial - IT technology blog
Beyond Boolean Soup: Architecting Robust React Logic with XState
June 5, 2026
Linux tutorial - IT technology blog
Why Is My Linux Load Average High Despite Low CPU Usage?
June 5, 2026
Database tutorial - IT technology blog
Posted inDatabase

Querying MySQL, MongoDB, and CSV Directly from PostgreSQL using FDW

May 1, 2026
Tired of ETL? Learn how to use PostgreSQL Foreign Data Wrappers (FDW) to query MySQL, MongoDB, and CSV files as if they were local tables. Real-world performance tips included.
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Database tutorial - IT technology blog
Posted inDatabase

Redis Sentinel vs. Redis Cluster: Surviving Production Failures

May 1, 2026
Is your Redis setup ready for a crash? Learn the practical differences between Redis Sentinel for high availability and Redis Cluster for horizontal scaling, including real-world configuration steps.
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DevOps tutorial - IT technology blog
Posted inDevOps

Stop Building Servers Manually: A Guide to Golden Images with HashiCorp Packer

May 1, 2026
Ditch manual server snapshots. Learn how to build automated, production-ready Golden Images for AWS and Proxmox using HashiCorp Packer and HCL2.
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AI tutorial - IT technology blog
Posted inAI

Stop Burning Credits: LLM Cost Optimization with GPTCache and Redis

May 1, 2026
Reduce LLM API costs by 80% and cut latency from seconds to milliseconds. This guide explores implementing production-grade semantic caching using GPTCache and Redis.
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Linux tutorial - IT technology blog
Posted inLinux

Linux Environment Variables: From Local Shells to Production Servers

May 1, 2026
Master Linux environment variables with this practical guide. Learn the differences between .bashrc and /etc/environment, how to handle .env files, and best practices for securing production secrets.
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AI tutorial - IT technology blog
Posted inAI

Fixing RAG Retrieval Failures: A Practical Guide to BM25 and Hybrid Search

May 1, 2026
Vector search often misses exact technical terms and specific IDs. This guide explains how to combine BM25 and Vector Search using Hybrid Search and RRF to increase RAG accuracy by up to 20%.
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Networking tutorial - IT technology blog
Posted inNetworking

Split-Horizon DNS with BIND9: Stop Hairpinning Your Internal Traffic

April 30, 2026
Solve routing loops and improve network security by configuring Split-Horizon DNS with BIND9. This guide shows you how to serve different IP addresses based on the user's location.
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DevOps tutorial - IT technology blog
Posted inDevOps

Crossplane on Kubernetes: Moving Beyond Terraform to GitOps Control Planes

April 30, 2026
Ditch the manual 'terraform apply' and move to a self-healing control plane. This guide shows you how to use Crossplane and GitOps to manage cloud resources directly through Kubernetes.
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Database tutorial - IT technology blog
Posted inDatabase

PostgreSQL Stored Procedures and Triggers: Stop Leaking Your Business Logic

April 30, 2026
Stop duplicating business logic across microservices. Learn how to use PostgreSQL Stored Procedures and Triggers to centralize your rules and slash API latency.
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Linux tutorial - IT technology blog
Posted inLinux

Mastering Sed and Awk: High-Performance Linux Text Processing

April 30, 2026
Ditch the heavy editors. Master Sed and Awk to process massive log files and automate reports directly from the Linux command line without risking a server crash.
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