VPS know-how & server operations
Tutorials, optimization and server operations for developers and sysadmins. Practical, concise, and well-sourced.
Vietnam IPv4 Shortage: Buying Strategies for Foreign Firms
Hướng dẫn mua IPv4 tại Việt Nam khi nguồn địa chỉ cạn kiệt: chiến lược, giải pháp thay thế cho doanh nghiệp nước ngoài cần IP Việt.
Why Clean Dedicated IP SMTP VPS Matters in Vietnam
Why a clean dedicated IP SMTP VPS is crucial for email deliverability in Vietnam. Learn how to protect sender reputation and avoid blacklists.
Buy Vietnam IPv4 Address for Foreign Companies in 2026
Practical guide for foreign companies on acquiring a Vietnam IPv4 address: APNIC vs hosting rental, legal notes, and managing the IP once you have it.
Configure a clean dedicated IP for an SMTP VPS on AlmaLinux
Step-by-step setup for a clean dedicated IP on an SMTP VPS in Vietnam running AlmaLinux 9: rDNS, SPF, DKIM, DMARC, port 25, and sender reputation checks.
Implement Centralized Log Management with Grafana Loki on Rocky Linux 9
Hướng dẫn triển khai hệ thống log tập trung với Grafana Loki trên Rocky Linux 9: cài đặt, cấu hình, tối ưu và xử lý sự cố.
VPS Server Monitoring Tools and Strategies for 2026
A practical guide to VPS server monitoring in 2026: which metrics matter, which tools to run, and how to set alerts before a small problem becomes an outage. For sysadmins running their own infrastructure.
VPS for internal company data storage, a 2026 setup guide
A practical guide to setting up a VPS for internal company data storage on Ubuntu 24.04, covering Samba, Nextcloud, backups, and access control for your team.
Set up a VPS for running an email marketing system
Hướng dẫn kỹ thuật dựng hệ thống email marketing tự quản trên VPS: kiến trúc, SMTP, chống spam, theo dõi chiến dịch, và đo hiệu suất gửi.
How to check if a VPS IP is blacklisted
Learn how to check if a VPS IP is blacklisted: DNSBL lookup tools, RBL checks, sender reputation on SMTP, and how to fix blacklisted IPs on a Linux VPS.
Why VPS emails land in spam and how to fix it
This post explains why emails sent from a VPS land in spam and gives you a step-by-step, command-level fix for SPF, DKIM, DMARC, rDNS, and IP warmup that actually gets mail into the inbox.
How to back up a VPS before an upgrade
Hướng dẫn sao lưu VPS trước khi nâng cấp hệ điều hành hoặc phần mềm: snapshot, backup dữ liệu, cấu hình và quy trình rollback an toàn cho Linux VPS.
Configure SPF, DKIM, and DMARC on a mail VPS
Hướng dẫn cấu hình SPF, DKIM, DMARC trên VPS mail để email không vào spam, tăng tỷ lệ gửi thành công. Kèm lệnh kiểm tra và xử lý lỗi.
Set up rDNS on an SMTP VPS in 2026
A practical walkthrough to set up rDNS on an SMTP VPS, why it matters for email deliverability, what to request from your provider, and how to verify it with dig and host.