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

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...

Fixing Python Memory Errors When Generating Large Files

You're running a Python script that generates a large file—maybe a CSV with millions of rows ...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist

Fix VS Code 'Permission Denied' When Saving Files

You're editing a file in Visual Studio Code, hit Ctrl+S, and get an error: "Failed to sav...

How to Fix Windows Update Service Not Running

If Windows Update won't start or you see an error like "Windows Update cannot check for u...

Git Detached HEAD Warning Explained: Causes and Fixes

You see a warning: "You are in 'detached HEAD' state." This happens when you chec...