Linh Tran
Linh handles the backend systems that keep RedirHub fast and reliable. Her work revolves around performance, scalability, and making sure redirects happen instantly, no matter where users are. She also writes about redirect performance and link tracking. She likes solving complex problems quietly.
3 posts
QR Codes
Why Your QR Code Stopped Working?
A QR code can stop working because of print damage, poor contrast, a deleted destination, a failed redirect, or a lapsed service plan. This guide helps you isolate the cause and prevent repeat failures.
September 9, 2026
Security
Let's Encrypt 45-Day Certificates: Timeline and How to Prepare
Let's Encrypt is cutting certificate lifetimes from 90 to 45 days between 2026 and 2028, and the CA/Browser Forum caps every public certificate at 47 days by 2029. The dates, what changes for renewals, ACME vs manual, and a checklist for redirect domains.
July 1, 2026
Seo
Best Practices During a Site Migration
A complete guide to website migration best practices: URL mapping, 301 redirects, 404 monitoring, post-migration traffic analysis, and how to preserve rankings through every step.
May 1, 2026