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

Fix 'Permission Denied' When Using mkdir in VS Code Terminal

You're working in the VS Code integrated terminal and run a mkdir command only t...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Fix Cloudflare 521 Error Due to Server Overload

You see a Cloudflare 521 error page. The message says the web server is down. Often, this means y...

Windows Search Index Not Finding Files: How to Fix

Windows Search stops finding files for a variety of reasons. The index might be corrupted, settin...

Checklist for Troubleshooting Nginx Permission Denied Errors

Understanding the Problem

When Nginx returns a 403 Forbidden or logs an error like ...