Knowledge base for software setup, errors, and daily tool work.

Fix VS Code Breakpoint Not Hit in Express App

You set a breakpoint in your Express route handler, start debugging, and the breakpoint is never ...

Fixing Nginx Upstream Connection Refused in Load Balancing

When Nginx load balancing returns upstream connection refused, it means one or more ...

Fix Firefox Secure Connection Failed Not Loading

If Firefox shows a “Secure Connection Failed” error and won’t let you load a site, it usually mea...

Fix Nginx Permission Denied for Static Files

Common Causes

When Nginx returns a 403 Forbidden or 'permission denied' error for...

Fix DNS Probe Finished NXDOMAIN with VPN Issues

When you see 'DNS probe finished NXDOMAIN' in your browser while a VPN is active, it mean...