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 a Detached HEAD in Git Using SourceTree

If you open SourceTree and see a message like “You are in ‘detached HEAD’ state,” it means your w...

How to Fix Chrome Sync Error 'Sign In Again'

What the Error Means

When Chrome displays 'Sign in again' in the sync settings, i...

Fix 'pip externally managed environment' on Ubuntu 23.04

If you're on Ubuntu 23.04 (Lunar Lobster) and try to install a Python package with pip, you m...

Fix Nginx 13 Permission Denied Error: Step-by-Step

You're configuring Nginx and see 13: Permission denied in the error log. This us...

How to Reinstall Windows Security App (Microsoft Defender)

If the Windows Security app (Microsoft Defender) is missing, crashing, or not opening, reinstalli...