ITNotes - Page 36 of 84 - From Terminal to Cloud

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.

Database

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.

DevOps

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.

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.

Linux

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.

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%.

Networking

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.

Database

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.

Linux

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.

Building a Production-Ready REST API with Spring Boot, Spring Security, JPA, and Docker

Building a Laravel REST API with Docker: From Zero to Production in 2024

Mastering Prometheus Alertmanager: Routing, Grouping, Inhibition, and Smart Alert Delivery to Telegram and PagerDuty

Securing IoT Devices at Home and in Your HomeLab: VLAN Segmentation, Firmware Monitoring, and Blocking Suspicious Connections

Mastering Protocol Buffers: Schema-first API Design for Multi-language Projects

Deploy FerretDB on Docker: MongoDB-Compatible Open Source Database Built on PostgreSQL

Practical Web Security: Hunting XSS, SQLi, and IDOR with Burp Suite Community

Deploy OpenCTI on Docker: Build Your Own Threat Intelligence Lab

Beyond Boolean Soup: Architecting Robust React Logic with XState

Why Is My Linux Load Average High Despite Low CPU Usage?

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

Redis Sentinel vs. Redis Cluster: Surviving Production Failures

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

Stop Burning Credits: LLM Cost Optimization with GPTCache and Redis

Linux Environment Variables: From Local Shells to Production Servers

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

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

PostgreSQL Stored Procedures and Triggers: Stop Leaking Your Business Logic

Mastering Sed and Awk: High-Performance Linux Text Processing