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

Fix Git Clone Timeout by Adjusting Config Settings

When git clone fails with a timeout error, it's often because the connection is ...

Fix Nginx Configuration Test Failed on Ubuntu

When you run nginx -t on Ubuntu and get an error, Nginx won't reload or restart....

Docker Container Exits Immediately with Exit Code 137

You start a Docker container, and it exits almost immediately with exit code 137. This usually me...

Fix Docker Volume Permission Denied for Postgres

Docker Network Not Found: Troubleshooting Checklist

When Docker complains network not found, containers can't start or connect. This...

How to Set Up a Wildcard Subdomain DNS Record in Cloudflare

If you need all subdomains (e.g., *.example.com) to point to the same IP or service, a wildcard D...