ITNotes - Page 108 of 143 - From Terminal to Cloud

ClickHouse Guide: Moving from Row-Store Bottlenecks to Millisecond Analytics

April 19, 2026

Ditch slow SQL aggregations. This hands-on guide walks you through installing ClickHouse on Ubuntu and Docker, with tips on memory tuning and the powerful MergeTree engine.

Security

Centralized Access Control with Teleport: A Guide to SSH, Kubernetes, and Database Security

April 19, 2026

Ditch static SSH keys for good. This guide walks through setting up Teleport to centralize access to servers, Kubernetes, and databases with short-lived certificates and MFA.

Networking

Configuring GRE and VXLAN Tunnels on Linux: Building Reliable Overlay Networks

April 19, 2026

Tunnels are the backbone of modern cloud networks. Learn to configure GRE for L3 routing and VXLAN for L2 overlays on Linux with production-ready MTU settings and troubleshooting tips.

Linux

Mastering the Linux Command Line: A Professional Guide to Zsh and Oh My Zsh

April 19, 2026

Tired of the plain Bash terminal? Learn how to transform your Linux CLI using Zsh and Oh My Zsh to improve autocompletion, visual feedback, and overall workflow efficiency.

Security

Hardening Linux with Firejail: A 6-Month Review of App Sandboxing

April 19, 2026

Standard Linux permissions are an all-or-nothing game. After 6 months of testing, I've found Firejail to be the most effective way to sandbox apps and protect sensitive data without the headache of SELinux.

Automating Code Reviews: 6 Months with AI-Powered PR-Agent and GitHub Actions

April 19, 2026

Learn how to integrate AI-powered code reviews into your CI/CD pipeline using PR-Agent and GitHub Actions. This 6-month production review covers setup, logic bug detection, and advanced configuration tips.

Linux

Mastering Chroot on Linux: System Rescue and Recovery from a Live USB

April 18, 2026

Chroot is the fastest way to rescue a Linux system that won't boot — reset passwords, fix GRUB, repair broken packages, and recover from bad fstab edits, all from a Live USB. This guide covers real-world recovery scenarios with working commands you can run at 2 AM without thinking.

Database

Recursive CTE in SQL: Handling Tree and Hierarchy Data in PostgreSQL and MySQL

April 18, 2026

Recursive CTEs let you query hierarchical data — org charts, category trees, comment threads — in a single SQL statement, without N+1 queries. This guide covers the pattern in PostgreSQL and MySQL 8.0+ with practical examples and performance tips.

LLM Evaluation: Practical Methods and Tools to Measure AI Model Quality in Production

April 18, 2026

LLM evaluation is the practice of systematically measuring whether your AI model's outputs are accurate, relevant, and safe — not just fast. This guide covers practical setup with DeepEval and RAGAS, CI/CD integration, and production monitoring strategies drawn from real deployment experience.

Database

Scaling PostgreSQL for Time-Series: A Hands-on TimescaleDB Guide

April 18, 2026

Tired of slow PostgreSQL queries? Learn how TimescaleDB uses hypertables and columnar compression to handle millions of rows per day without breaking a sweat.

Fast LLM Fine-Tuning with Unsloth on Linux: Cut 80% VRAM on Consumer GPUs

Mastering ScyllaDB on Docker: Deploying Ultra-Fast C++ NoSQL for High-Throughput Writes

Building an Internal Developer Portal with Spotify Backstage: Software Catalog, TechDocs, and Platform Automation

Kubernetes Disaster Recovery with Velero and MinIO: Complete Cluster Backup Guide

Build Real-Time Apps with Phoenix LiveView: Server-Side State Without JavaScript

Deploy a TACACS+ Server on Linux with tac_plus: Centralized AAA and Command Authorization

Deploy Immich on Docker: Self-Hosted Google Photos Alternative with AI

GitOps for HomeLab: Automate Kubernetes and K3s Deployments with Argo CD

Structured Data Extraction with BAML and Python: Faster LLM Output and Visual Prompt Testing

Mastering HugePages and Transparent HugePages on Linux for PostgreSQL and Redis

ClickHouse Guide: Moving from Row-Store Bottlenecks to Millisecond Analytics

Centralized Access Control with Teleport: A Guide to SSH, Kubernetes, and Database Security

Configuring GRE and VXLAN Tunnels on Linux: Building Reliable Overlay Networks

Mastering the Linux Command Line: A Professional Guide to Zsh and Oh My Zsh

Hardening Linux with Firejail: A 6-Month Review of App Sandboxing

Automating Code Reviews: 6 Months with AI-Powered PR-Agent and GitHub Actions

Mastering Chroot on Linux: System Rescue and Recovery from a Live USB

Recursive CTE in SQL: Handling Tree and Hierarchy Data in PostgreSQL and MySQL

LLM Evaluation: Practical Methods and Tools to Measure AI Model Quality in Production

Scaling PostgreSQL for Time-Series: A Hands-on TimescaleDB Guide