VPS know-how & server operations
Tutorials, optimization and server operations for developers and sysadmins. Practical, concise, and well-sourced.
Running CI/CD runners on the same VPS as GitLab and when it breaks
A practical guide to running GitLab CI/CD runners on the same VPS as your GitLab instance, when resource contention hits, and how to know it's time to separate runners onto dedicated infrastructure.
Self-hosted GitLab CE: minimum viable server spec
This guide lays out the real minimum server requirements to run GitLab CE without constant OOM kills, swapping, or timeouts, and matches the spec to a suitable VPS plan.
Hosting a Vietnamese-language WordPress site close to its audience
Hosting a Vietnamese-language WordPress site in Vietnam reduces latency, improves SEO locally, and lets you pass compliance checks. This guide covers the network, IP, infrastructure, and site-speed reasons.
Sizing a VPS for a WooCommerce store by concurrent checkout load
Learn exactly how much RAM, CPU, and storage your WooCommerce store needs by mapping concurrent checkout sessions to VPS resources.
Moving a WordPress site from shared hosting to a VPS
Step-by-step guide to migrate a WordPress site from shared hosting to a VPS with zero-downtime cutover and proper DNS TTL handling. Covers backup, rsync, database dump, DNS changes and verification.
Why shared SMTP relays hurt deliverability once you scale
Learn why shared SMTP relay deliverability drops as your email volume grows, and when to switch to a dedicated IP on a Vietnam VPS.
Warming up a new sending IP: a realistic 30-day schedule
Learn the correct 30-day IP warmup schedule for email sending. A day-by-day volume table, technical commands, and real-world advice to protect your sender reputation.
SPF, DKIM and DMARC on a self-hosted SMTP server
A step-by-step guide to configuring SPF, DKIM, and DMARC on your self-hosted SMTP server to improve email deliverability and prevent spoofing.
Port 25 access on a VPS: why most providers block it and when it is opened
Understand why most VPS providers block port 25 by default, how to request it unlocked, and when it makes sense for your email infrastructure.
A clean dedicated IP for outbound email: what clean actually means
Learn what a clean dedicated IP for outbound email really means: no blacklist history, proper rDNS, isolated reputation. Essential reading for anyone operating a self-hosted mail server.
Scheduling long-running automation jobs on a server you control
Learn how to run persistent automation workflows using systemd timers, cron, and supervision on your own VPS. Practical guide with real commands for restart-on-failure and process control.
Why browser automation needs a dedicated IP
A practical breakdown of why browser automation scripts (QA, monitoring, CI) need a dedicated, clean IPv4. Covers IP reputation, CAPTCHA reduction, and the case for a Vietnam VPS.
Running OpenClaw on a VPS: memory, headless Chrome and stability
Learn the real memory requirements for running OpenClaw browser automation on a VPS. Minimum specs, headless Chrome tuning, and stability tips for production workloads.