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

Setup Cloudflare Origin Certificate for Nginx

If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...

How to Fix 'Git Remote Origin Already Exists' Error When Cloning

You run git clone and get fatal: remote origin already exists. This err...

Docker Container Exits Immediately: How to Find Logs and Fix It

You start a Docker container and it stops within seconds. The status shows "Exited (0)" o...

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 ...

VS Code Source Control Not Detecting Changes on Mac: Fixes

You make edits in VS Code on your Mac, but the Source Control panel shows nothing. No files appea...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...