ITNotes - Page 47 of 119 - From Terminal to Cloud

Stop Paying for PagerDuty: How to Self-Host Grafana OnCall on a $5 VPS

May 26, 2026

Ditch the expensive SaaS fees. This guide shows you how to deploy Grafana OnCall using Docker Compose to create a robust, self-hosted incident response system.

Linux

Mastering udev Rules: Fix Shifting USB Names and Automate Linux Hardware

May 26, 2026

Tired of your Linux device names changing after every reboot? Learn how to write udev rules to create persistent symlinks, automate hardware scripts, and manage USB permissions like a pro.

Programming

Rust’s Secret Sauce: Mastering Ownership and Borrowing Without the Garbage Collector

May 26, 2026

Rust eliminates the need for a garbage collector without sacrificing memory safety. Explore the core principles of ownership, borrowing, and lifetimes with practical examples.

Security

WordPress Security Hardening: Stop Brute Force, SQLi, and RCE Before They Hit

May 25, 2026

Harden your WordPress site against brute force, SQL injection, and remote code execution using a layered approach: security plugins, Nginx rate limiting, file integrity monitoring, and database privilege restriction. Practical commands and configs included.

DevOps

Docker Multi-stage Build and Distroless Images: Shrink Your Container to Just a Few MB

May 25, 2026

Learn how to use Docker multi-stage builds and distroless base images to shrink your container from 1 GB down to just a few MB — with real Dockerfile examples for Go, Node.js, Python, and Java. Includes security hardening tips and CVE reduction techniques for production deployments.

Database

PostgreSQL Performance Analysis with pg_stat_statements: Find and Fix Slow Queries

May 25, 2026

pg_stat_statements is a built-in PostgreSQL extension that tracks aggregated execution statistics for every query — total time, call count, cache hit rate, and more. This guide walks through enabling it, querying the data to find your worst bottlenecks, and turning those stats into concrete index and query optimizations for production.

Linux

Stop Hardcoding SMTP: Set Up a Postfix Mail Relay for Linux Alerts

May 25, 2026

Learn how to configure Postfix as a send-only mail relay on Linux. This guide covers installation, security hardening, and address rewriting to ensure your system alerts and Cron jobs deliver emails reliably.

Networking

Stop Sending Users Across the Globe: Building GeoDNS with PowerDNS

May 25, 2026

Stop wasting milliseconds. Learn how to build a self-hosted GeoDNS using PowerDNS to route global traffic to the nearest server for maximum performance.

Deploying Microsoft Phi-4 with Ollama: High-Performance SLMs for Edge and Local Hardware

May 25, 2026

Learn how to deploy Microsoft's Phi-4 Small Language Model locally using Ollama. This guide covers hardware specs, Python integration, and optimization for edge devices.

Programming

Stop Writing API Clients by Hand: A Guide to OpenAPI Generator

May 25, 2026

Eliminate manual API updates and type mismatches. Learn how to use openapi-generator to automate Client SDKs and Server Stubs directly from your OpenAPI spec.

Speed Up Python with Numba JIT: Make Heavy Data Processing 100x Faster

CDK for Terraform (CDKTF) with Python: Deploy Cloud Resources Without Writing HCL

Clean Up Your Java Code: A Practical Guide to Vavr

Stop Deploying Broken Docker Images: A Guide to Container Structure Tests

Mastering Golang Memory Profiling: A Practical Guide with pprof

Stop Storing Secrets in Git: A Guide to 1Password Connect on Kubernetes

Building a Network Performance Testbed: High-Speed Testing with TRex on Linux

Stop Writing Boilerplate: A Guide to Python Dataclasses, Attrs, and Pydantic

Build Your Own Private 5G Network: A Hands-On Guide with Open5GS and srsRAN

Mastering Socket.IO in Node.js: Building Secure, Production-Ready Real-Time Apps

Stop Paying for PagerDuty: How to Self-Host Grafana OnCall on a $5 VPS

Mastering udev Rules: Fix Shifting USB Names and Automate Linux Hardware

Rust’s Secret Sauce: Mastering Ownership and Borrowing Without the Garbage Collector

WordPress Security Hardening: Stop Brute Force, SQLi, and RCE Before They Hit

Docker Multi-stage Build and Distroless Images: Shrink Your Container to Just a Few MB

PostgreSQL Performance Analysis with pg_stat_statements: Find and Fix Slow Queries

Stop Hardcoding SMTP: Set Up a Postfix Mail Relay for Linux Alerts

Stop Sending Users Across the Globe: Building GeoDNS with PowerDNS

Deploying Microsoft Phi-4 with Ollama: High-Performance SLMs for Edge and Local Hardware

Stop Writing API Clients by Hand: A Guide to OpenAPI Generator