VPS know-how & server operations
Tutorials, optimization and server operations for developers and sysadmins. Practical, concise, and well-sourced.
Set up a secure WireGuard VPN on Rocky Linux VPS
This guide builds a WireGuard VPN server on Rocky Linux 9 VPS optimized for China users. Hardware requirements, firewall with nftables, client configs, and troubleshooting included.
Vietnam Decree 53 data localization compliance for foreign businesses
Understand Vietnam Decree 53 data localization rules effective 2026, who they apply to, what data must stay local, and the practical compliance options for foreign businesses.
Self-Host GitLab CE on Ubuntu VPS in Vietnam
A step-by-step guide to self-host GitLab Community Edition on an Ubuntu 24.04 VPS in Vietnam, with sizing, installation, and hardening steps for a self-managed server.
Secure an AlmaLinux 9 VPS with SELinux and Firewalld
Hướng dẫn bảo mật AlmaLinux 9: bật SELinux enforcing, cấu hình Firewalld đúng cách, mở port SSH/HTTP/HTTPS kèm lệnh kiểm tra.
DV SSL vs Wildcard SSL Which to Buy
So sánh DV SSL và Wildcard SSL dựa trên phạm vi bảo vệ, chi phí và độ phức tạp triển khai. Chọn đúng loại chứng chỉ cho VPS, tiết kiệm tiền và tránh lãng phí.
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 change the default SSH port on a VPS
A practical guide to moving SSH off port 22 on a Linux VPS: why it matters, how to edit sshd_config safely, how to update firewall and SELinux, and how to avoid locking yourself out.
How to connect to a Linux VPS over SSH for the first time
Hướng dẫn từng bước kết nối VPS Linux lần đầu qua SSH, tạo key pair, phân quyền đúng và bảo mật ngay từ giây đầu tiên.
Install a GoGetSSL certificate on NGINX
Step-by-step guide to install a GoGetSSL SSL certificate on NGINX. Covers CSR generation, certificate installation, SSL configuration, and verification on a Linux VPS.
Install a Let's Encrypt SSL on a VPS with Certbot
Hướng dẫn cài chứng chỉ Let's Encrypt SSL miễn phí trên VPS bằng Certbot: cài đặt, cấu hình tự động gia hạn, kiểm tra chứng chỉ. Dành cho quản trị viên VPS
Set up Nginx as a reverse proxy on Ubuntu 24.04
Hướng dẫn cấu hình Nginx làm reverse proxy trên VPS Ubuntu 24.04, kèm các bước kiểm tra, xử lý lỗi và tối ưu cho production.
Protect web apps with ModSecurity WAF and OWASP CRS on Nginx
Harden your Nginx web server against SQL injection, XSS, and bot traffic using ModSecurity 3 and OWASP Core Rule Set, with real installation commands for Ubuntu 24.04.
Configure IPv6 on a VPS: Static Address, Firewall and Dual-Stack
Learn how to configure IPv6 on a Linux VPS with static addressing, nftables firewall rules, and dual-stack operation. Step-by-step for Ubuntu 24.04 and Debian 12.