admin, Author at ITNotes

Stop Guessing Your Uptime: A Practical Guide to SLOs with Prometheus and Sloth

May 16, 2026

Tired of noisy alerts? Learn how to implement SRE-style SLOs and SLIs. This guide walks you through using Sloth and Prometheus to manage your reliability and Error Budget effectively.

Database

Zero-Downtime Database Upgrades: A Survival Guide to Blue-Green Deployment

May 16, 2026

Forget the 2 AM panic. I walk through how to use Blue-Green deployment and logical replication to upgrade PostgreSQL and MySQL with zero downtime and total control.

DevOps

Automating API Testing in CI/CD with Postman and Newman: 6 Months of Production Reality

May 16, 2026

Based on 6 months of production use, this guide explains how to integrate Postman and Newman into CI/CD pipelines to catch API bugs before they hit production.

Networking

Surviving ‘Neighbor Table Overflow’: Tuning Linux ARP for High-Density Networks

May 16, 2026

Is your Linux server dropping packets with 'Neighbor Table Overflow'? Fix it by tuning sysctl gc_thresh parameters for large Layer 2 and Kubernetes networks.

Linux

Stop the Linux OOM Killer from Crashing Your Production Apps

May 15, 2026

Is the OOM Killer terminating your critical Linux processes? Learn how to diagnose logs, adjust process priorities, and tune kernel memory settings to keep your server stable.

HomeLab

Taming the Power Bill: Optimizing Your HomeLab with Powertop and TLP

May 15, 2026

Slash your HomeLab's electricity bill. This guide covers real-world power optimization using Powertop auto-tuning, TLP configuration, and smart scheduling to reduce idle draw.

Linux

SSH ProxyJump and Bastion Hosts: A Practical Guide to Secure Linux Access

May 15, 2026

Master SSH ProxyJump to securely manage private Linux servers. This guide provides a setup walkthrough, configuration tips, and security best practices for Bastion Hosts.

Security

6 Months of Linux Threat Hunting with Chainsaw and Sigma: A Field Report

May 15, 2026

Ditch reactive logging. I spent six months using Chainsaw and Sigma rules to build a proactive Linux threat hunting workflow that scans 10GB of logs in seconds.

HomeLab

Building a Bulletproof Malware Lab on Proxmox: Isolation and Snapshot Guide

May 15, 2026

Build a secure malware sandbox on Proxmox. This guide covers isolated network bridges, Flare-VM setup, and snapshot workflows for safe malware detonation.

Networking

Build Scalable Layer 2 Overlays: EVPN/VXLAN with FRRouting and Open vSwitch on Linux

May 15, 2026

Ditch the limitations of 802.1Q. This guide shows you how to implement a high-performance EVPN/VXLAN overlay on Linux using FRRouting and Open vSwitch for ultimate scalability.