ITNotes - Page 2 of 142 - From Terminal to Cloud

MySQL Replication with GTID: Master-Slave Setup and Safe Production Failover

October 18, 2026

Discover how switching to GTID-based MySQL replication eliminates fragile binary log coordinates during production incidents. Follow this real-world guide to configure master-slave clusters and execute zero-data-loss failover safely.

HomeLab

Install and Configure OPNsense on Proxmox VE: Multi-VLAN Routing, Zenarmor, and Hardened HomeLab Security

October 18, 2026

Deploy virtualized OPNsense on Proxmox VE using VLAN-aware Linux bridges, strict inter-VLAN firewall rules, and Zenarmor Next-Gen inspection to secure your homelab.

HomeLab

Deploy Wazuh SIEM & XDR on Docker: Complete HomeLab Security Monitoring

October 18, 2026

Deploy a complete Wazuh SIEM & XDR stack in your homelab using Docker Compose. Step-by-step instructions cover Linux kernel tuning, mTLS certificate generation, container orchestration, and client agent enrollment.

Networking

Linux Network Bonding and 802.3ad LACP: Configure Link Aggregation for High Availability and Bandwidth

October 18, 2026

Eliminate single-cable network failures and bandwidth bottlenecks on Linux hosts. This guide covers how to set up IEEE 802.3ad LACP bonding with Netplan and nmcli, verify switch negotiation, and run non-disruptive failover tests.

Networking

Deploy Suricata IDS/IPS on Linux: Real-Time Traffic Analysis and Network Defense

October 18, 2026

Deploy Suricata on Linux for real-time intrusion detection and prevention. This guide covers AF_PACKET multi-threading, NFQueue inline packet dropping, custom rules, and production tuning.

Networking

Building a Stratum 1 NTP Server with GPS PPS and Chrony on Linux

October 18, 2026

Public internet NTP pools introduce clock skew that breaks distributed databases and log pipelines. Here is a battle-tested guide to building an isolated, sub-microsecond Stratum 1 NTP server on Linux with GPS PPS and Chrony.

Security

Preventing Cross-Site WebSocket Hijacking (CSWSH): Securing Real-Time Connections

October 18, 2026

Cross-Site WebSocket Hijacking (CSWSH) allows malicious websites to hijack authenticated real-time data feeds. Discover how to inspect the Origin header, implement one-time tickets, and configure reverse proxies to keep WebSocket connections secure.

Build Visual Document RAG with ColPali and Byaldi: Zero-OCR PDF Retrieval

October 18, 2026

Tired of broken OCR pipelines scrambling tables and charts? Learn how to implement visual document retrieval with ColPali and Byaldi to index complex PDF pages directly without text extraction.

Linux

Headless KVM/QEMU Virtualization with Virsh: CLI Virtual Machines and Bridged Networking

October 18, 2026

Deploy lean, headless KVM/QEMU virtual machines on Linux using virsh. Master command-line provisioning, bridge networking, live resource scaling, and serial console troubleshooting.

Database

PostgreSQL Autovacuum Optimization: Diagnose I/O Bottlenecks, Prevent Wraparound, and Tune Production

October 18, 2026

Eliminate disk I/O bottlenecks and resolve dead tuple bloat through practical PostgreSQL autovacuum tuning. Learn how to configure cost limits, tune high-churn tables individually, and safeguard production clusters from transaction ID wraparound outages.

Mitigate DDoS with BGP Flowspec and ExaBGP on Linux: Automated Routing-Level Packet Filtering

Deploy Harbor on Docker: Self-Host a Secure Private Container Registry with Trivy and Image Signing for Your HomeLab

Building a Production-Ready Text-to-SQL Engine with Vanna.ai and Python

Deploy CrowdSec on Linux: Building a Distributed IPS to Block Brute Force and Web Attacks

Route-Based IPsec VPN with strongSwan and VTI on Linux: Secure Cloud-to-On-Premises Connectivity

Automate Kubernetes Troubleshooting with K8sGPT and Local Ollama

Mastering Outlines in Python: Guaranteed Structured LLM Output with Regex and CFGs

Mastering Cursor Rules and Context Mentions: Standardize Architecture Across Your Dev Team

Deploying HashiCorp Vault on Kubernetes: Dynamic Secrets and Sidecar Injector Guide

Deploying WPA3-Enterprise with FreeRADIUS and EAP-TLS: Mutual PKI Authentication Guide

MySQL Replication with GTID: Master-Slave Setup and Safe Production Failover

Install and Configure OPNsense on Proxmox VE: Multi-VLAN Routing, Zenarmor, and Hardened HomeLab Security

Deploy Wazuh SIEM & XDR on Docker: Complete HomeLab Security Monitoring

Linux Network Bonding and 802.3ad LACP: Configure Link Aggregation for High Availability and Bandwidth

Deploy Suricata IDS/IPS on Linux: Real-Time Traffic Analysis and Network Defense

Building a Stratum 1 NTP Server with GPS PPS and Chrony on Linux

Preventing Cross-Site WebSocket Hijacking (CSWSH): Securing Real-Time Connections

Build Visual Document RAG with ColPali and Byaldi: Zero-OCR PDF Retrieval

Headless KVM/QEMU Virtualization with Virsh: CLI Virtual Machines and Bridged Networking

PostgreSQL Autovacuum Optimization: Diagnose I/O Bottlenecks, Prevent Wraparound, and Tune Production