VPS know-how & server operations
Tutorials, optimization and server operations for developers and sysadmins. Practical, concise, and well-sourced.
VPS vs dedicated server which one do I need
So sánh VPS và dedicated server dựa trên chi phí, hiệu năng, khả năng mở rộng và bảo trì để xác định lựa chọn phù hợp cho dự án của bạn.
VPS vs shared hosting for a growing website
So sánh VPS và shared hosting cho website đang tăng trưởng: khi nào cần nâng cấp, khác biệt về tài nguyên, root access, hiệu năng và chi phí cho nhà phát triển.
Vietnam VPS vs offshore VPS for local traffic
So sánh VPS Việt Nam và VPS nước ngoài cho traffic nội địa: độ trễ, IPv4, pháp lý, giá. Chọn đúng cho người dùng Việt.
Linux or Windows Server VPS: How to choose in 2026
A practical guide to choosing between a Linux or Windows Server VPS: workload fit, licensing costs, RAM needs, and when each makes sense.
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 create and restore a VPS snapshot on KVM
Học cách tạo và khôi phục VPS snapshot trên nền tảng KVM: thao tác từ control panel, kiểm tra snapshot, rollback an toàn và các lưu ý về dung lượng.
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.
How to Enable Swap on a Low-RAM VPS
A practical guide to adding swap space on a low-RAM VPS so Linux stops killing processes, with exact commands and verification steps for Ubuntu 24.04 and Debian 12.
How to configure the UFW firewall on an Ubuntu VPS
Lock down an Ubuntu VPS with UFW: default deny, allow SSH, rate limiting, and verify rules. Step-by-step commands for a secure 2026 setup.
How to benchmark NVMe disk speed on a VPS
A practical guide to benchmarking NVMe disk speed on a VPS with fio and dd. Learn the exact commands, how to read the metrics, and why testing with fio's keep-io-depth matters.
Why my VPS runs out of RAM and how to fix it
Find why your VPS runs out of RAM, diagnose top memory consumers, and reclaim gigabytes with practical fixes for Ubuntu 24.04 and Debian 12.
How to reduce memory usage on a Linux VPS
Learn how to reduce memory usage on a Linux VPS with practical steps: tuning MySQL/MariaDB, optimizing PHP-FPM, configuring swap, and identifying RAM hogs.