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

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

Fix Nginx Configuration Test Syntax Errors

When you run nginx -t and see syntax error, the nginx service will ...

Docker Compose Environment Variable Not Set in Container: Fixes

You ran docker-compose up, but the environment variable you defined isn't availa...

Cloudflare 521 Error: Troubleshooting and Fixes

When you see a 521 Web Server Is Down error, it means Cloudflare cannot establis...

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...