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

Cloudflare SSL Full Strict Configuration Checklist

If you see 'This website is not available' or a redirect loop after enabling Cloudflare S...

Fix Cloudflare Origin Certificate with Let's Encrypt

If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fix Python Permission Denied When Running pip install -r requirements.txt

How to Fix Windows Search Indexing Not Working

If Windows Search stops returning results or takes too long, the indexing service is likely stall...

Fix Node.js Heap Out of Memory Error in PM2

If you're running a Node.js application under PM2 and seeing FATAL ERROR: CALL_AND_RETR...