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

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

Fix Windows 11 Installation Assistant Stuck at 99%

You're running the Windows 11 Installation Assistant, it reaches 99%, and then nothing happen...

Fix Docker Volume Permission Denied for Postgres

Fix VS Code Permission Denied Error on Windows 11

If you see "permission denied" when saving files, running terminals, or using extensions ...

Fix Cloudflare 521 Error on Nginx: Step-by-Step Guide

If you see a Cloudflare 521 error, it means your origin server (the Nginx server behind Cloudflar...

Fix 'python command not found' on Windows with Python Installed

You installed Python on Windows, but when you type python --version in Command Promp...