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

Cloudflare DNS Not Propagating to All Nameservers: Common Fixes

You changed a DNS record in Cloudflare, but some resolvers still show the old value while others ...

Fix Docker Volume Permission Denied for Postgres

Activate Python Virtual Environment in VS Code

You've created a Python virtual environment but can't get VS Code to use it. The terminal...

How to Reset Taskbar Icons in Windows 11: 4 Methods

If your Windows 11 taskbar icons are missing, showing generic file icons, or acting strangely, th...

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...

Docker Compose Ports Not Working: Common Fixes

You've defined ports in your docker-compose.yml, but containers aren't reachable on the e...