Why Transactional Email From a VPS IP Dies
Transactional mail from a new VPS IP often never reaches the inbox. This post covers blocklists, missing PTR, port 25, and when an ESP is the only path.
Email8 min read
NetBay journal
Guides for operators
Practical guides for Linux, containers, CI/CD, self-hosting, and running VPS infrastructure from Netbay Engineering.
599 articles · 24 topics
AllLinuxLinux AdministrationWindowsLinux SecurityLinux NetworkingContainersContainers & OrchestrationKubernetesCI/CDGitHubSelf-HostingBackups & DataDatabasesApp DeploymentDNS & TLSObservabilityEmailAI AgentsAI InfrastructureAPI & AutomationProxiesCloud ArchitectureHardware & PerformanceDevOps Practices
Run a Small LLM on a CPU VPS with llama.cpp
Compile llama.cpp, load a Q4 GGUF 3B to 8B model, and generate text on an Intel Xeon Platinum CPU VPS without a GPU on High-Speed SSD in Lucknow.
AI Infrastructure8 min read
Single-VPS Architecture That Still Has Layers
Treat one VPS as stacked layers — edge, app, data, and ops — so processes, disks, and bind addresses fail independently instead of as one blob.
Cloud Architecture8 min read
Running Arch Linux on a VPS: Pacman Essentials for Server Admins
Pacman essentials for Arch VPS admins: sync databases, full-system upgrades, keyring care, orphan cleanup, and .pacnew merges that keep servers predictable.
Linux7 min read
systemctl Essentials: Start, Stop, Enable, and Actually Understand Services
Master the difference between starting and enabling services, read systemctl status like a diagnostic tool, and control any systemd unit with confidence.
Linux Administration6 min read
Run PHP-FPM with nginx on Ubuntu, Not Apache
Put nginx in front of PHP-FPM on Ubuntu 24.04 so static files, TLS, and PHP workers stay isolated, then ship a unix-socket vhost ready for production traffic.
App Deployment8 min read
What an AI Agent Is: The Observe-Plan-Act Loop
Turn a chat model into a working agent on a Linux VPS by implementing the observe-plan-act loop, tool calls, and a stop condition you can audit.
AI Agents8 min read
PR Deploy Agent That SSHs Straight to a VPS
Wire a GitHub Action that asks an agent to plan a deploy, then SSHs a pinned script to a Lucknow VPS so pull requests land on a real host, not a slide deck.
AI Agents8 min read
The Twelve-Factor App: How Each Factor Maps to a Real VPS Deployment
A factor-by-factor walkthrough that turns the Twelve-Factor methodology into concrete choices for deploying an app on a single Linux VPS of your own.
DevOps Practices8 min read
SSH Key Authentication Setup: Why Passwords Are a Bad Default
Set up SSH key pairs on your Linux VPS and disable password logins to eliminate brute-force attacks in minutes.
Linux5 min read
Dockerfile Best Practices for Smaller and Safer Images
Pin base images, merge RUN layers, drop build tooling, and switch to a non-root user to ship Dockerfiles that produce smaller, safer images on rebuild.
Containers7 min read
GitHub Branch Protection in Depth: Checks and Rulesets
Branch protection controls exactly how code reaches main: required reviews, status checks, merge queues, and rulesets. Configure it correctly once.
GitHub7 min read