The complete library
All guides
2,725 practical hosting and technology articles.
Environment Variables in Shell: What $PATH Controls and How to Set It Properly
Every time you type python3 or nginx without specifying the full path, the shell has to find that executable somewhere. Here is a complete guide on $PATH in Linux
Linux AdministrationWhat Is a systemd Service and How to Create One
What is systemd and why every modern Linux VPS runs on it. A practical intro to PID 1, service units, and managing services without scripts and wrappers.
AIThe Complete Hermes CLI Cheatsheet: Manage Your Agent like a Pro
The only Hermes CLI cheatsheet you will actually use. Real workflows, common mistakes, and the commands that matter for running Hermes Agent day-to-day on a VPS.
EmailHow to Check SPF, DKIM and DMARC Using Message Evidence
Diagnose email authentication using real message identities and selectors, DNS answers and alignment instead of guessed records or delivery assumptions.
Linux AdministrationUnderstanding Signals in Linux: SIGTERM, SIGKILL, and the Others
What does Ctrl+C actually do in Linux? A practical guide to SIGTERM, SIGKILL, and other signals — and how to shut services down cleanly.
Linux AdministrationThe Exit Code Explained: How Scripts Report Success and Failure
Every command you run on Linux ends with a number. You rarely see it, but it is always there. Here is a complete guide to understand exit codes.
AIBuild an AI Memory Store: User Isolation, Updates and Expiry
Test a Qdrant memory store with owner-scoped queries, updates, expiry and deletion. Includes Python code and explicit authentication limits.
Docker ManagementDocker Compose Beyond Basics: Multi-Container Apps That Actually Work
Docker Compose Beyond Basics: build production multi-container apps with shared data, dependencies, restart policies, and reboot-safe networking.
AIEval-Driven Prompt Development: Define Success Before You Write the Prompt
Stop guessing if your LLM prompt is good. Write the tests first, then iterate until they pass. The eval-driven development workflow explained.
Linux NetworkingComplete Guide: How TCP Keepalives Keep Long-Idle Connections Alive
Stop guessing if your prompt is good. Write the test first, then iterate until it passes. Here is how eval-driven development makes LLM outputs measurable and repeatable.
EmailSelf-Hosted Newsletter with Listmonk: The Mailchimp Alternative You Run on Your VPS
Listmonk is one of the best self-hosted E-mail marketing tool. Learn How to deploy ListMonk on an Ubuntu server with this step-by-step guide.
LinuxWhat Is Cloud-Init and How Does It Work? The Complete Guide
cloud-init automates Linux server setup at boot. Here is how it works and how to use it on any VPS, including those without a cloud provider.