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

How to Change Git Remote URL with git remote set-url origin

Sometimes you need to change the remote URL of your Git repository — for example, after switching...

Debugging Jest Tests in VS Code: Breakpoints Not Hit

You set a breakpoint in a Jest test file, start debugging, and the test runs to completion but th...

Why VS Code Debugger Breakpoints Are Greyed Out and How to Fix

You set a breakpoint in VS Code, but it appears greyed out and the debugger skips it. This usuall...

Fix Cloudflare 521 Error: DNS Configuration Problem

If you see a Cloudflare 521 error page, it means Cloudflare's servers are unable to connect t...

Fix Python Permission Denied When Installing Virtualenv with Pip

When you run pip install virtualenv and see a Permission denied err...

Fix Nginx 502 Bad Gateway on Docker Ubuntu