ITNotes - Page 7 of 142 - From Terminal to Cloud

Parsing Complex Documents with IBM Docling and Python for Production RAG Pipelines

October 12, 2026

A hands-on guide to using IBM Docling and Python for document parsing in production RAG systems. Extract complex tables, formulas, and layouts into clean semantic chunks.

Linux

Stop Linux Brute-Force Attacks with Fail2ban and Nftables

October 12, 2026

Harden your Linux servers against aggressive SSH brute-force scans. Learn how to configure Fail2ban with Nftables atomic sets for fast O(1) packet drops without CPU bottlenecks.

Programming

Mastering gRPC in Go: High-Performance Microservices with Protocol Buffers, Streaming, and Interceptors

October 12, 2026

A hands-on breakdown of migrating Go microservices from HTTP/1.1 JSON to gRPC. Learn how Protocol Buffers, HTTP/2 multiplexing, streaming, and interceptors solved a real-world latency disaster.

Security

SSH Two-Factor Authentication with Google Authenticator PAM on Linux

October 12, 2026

Relying strictly on SSH keys leaves servers exposed if developer laptops or credentials are compromised. This guide explains how to integrate Google Authenticator PAM with OpenSSH to require both a private key and a dynamic TOTP code on Linux.

Database

Distributed Lock with Redis and Redisson: Preventing Race Conditions in Multi-Node Systems

October 12, 2026

Horizontal scaling breaks JVM-level mutexes and native locks. Learn how race conditions cause overselling in distributed clusters and how to implement robust distributed locking with Redis and Redisson in Java Spring Boot.

Linux

Master Linux Traffic Control (tc): Bandwidth Limiting, Latency Emulation, and Packet Loss with Netem and HTB

October 11, 2026

Simulate network instability and enforce strict bandwidth ceilings directly in the Linux kernel. This guide covers tc with Netem for latency and packet loss emulation, and HTB for granular egress shaping.

DevOps

Automate Kubernetes SSL/TLS Certificates with cert-manager and Let’s Encrypt: ClusterIssuer and Ingress Renewal

October 11, 2026

Tired of expired SSL certificates causing sudden Kubernetes downtime? Here is a complete guide to automating TLS management using cert-manager, Let's Encrypt, and Ingress controllers with automatic 30-day renewals.

Networking

Self-Hosting Headscale: Build a Private WireGuard Mesh VPN for Tailscale Clients

October 11, 2026

Learn how to self-host Headscale as an open-source Tailscale control server. This practical guide covers Docker deployment, Nginx reverse proxy configuration, node enrollment, and production best practices for running a secure, private WireGuard mesh VPN.

HomeLab

Deploy Traefik v3 on Docker: Automatic Service Discovery and Let’s Encrypt SSL for Your HomeLab

October 11, 2026

Deploy Traefik v3 on Docker with automated container discovery and Let's Encrypt SSL certificates. This step-by-step tutorial covers dynamic routing, DNS-01 challenges, and socket hardening for your HomeLab.

Scaling PostgreSQL Vector Search: HNSW Tuning and Table Partitioning for Production RAG

October 11, 2026

Scaling enterprise RAG with PostgreSQL and pgvector demands more than basic indexes. Discover how combining HNSW index tuning with declarative partitioning dropped p95 query latency from 2.8s to 14ms across 8 million vectors.

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

Parsing Complex Documents with IBM Docling and Python for Production RAG Pipelines

Stop Linux Brute-Force Attacks with Fail2ban and Nftables

Mastering gRPC in Go: High-Performance Microservices with Protocol Buffers, Streaming, and Interceptors

SSH Two-Factor Authentication with Google Authenticator PAM on Linux

Distributed Lock with Redis and Redisson: Preventing Race Conditions in Multi-Node Systems

Master Linux Traffic Control (tc): Bandwidth Limiting, Latency Emulation, and Packet Loss with Netem and HTB

Automate Kubernetes SSL/TLS Certificates with cert-manager and Let’s Encrypt: ClusterIssuer and Ingress Renewal

Self-Hosting Headscale: Build a Private WireGuard Mesh VPN for Tailscale Clients

Deploy Traefik v3 on Docker: Automatic Service Discovery and Let’s Encrypt SSL for Your HomeLab

Scaling PostgreSQL Vector Search: HNSW Tuning and Table Partitioning for Production RAG