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

Cloudflare Origin Certificate Setup for Apache

If you use Cloudflare's proxy (orange cloud), you can set up an origin certificate to encrypt...

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...

Fix Windows Cannot Access Shared Folder Due to Firewall

You try to open a shared folder on another PC and get an error like "Windows cannot access \\...

Windows 11 Update Stuck at 0% in Safe Mode: How to Fix

You boot into Safe Mode to troubleshoot a problem, but Windows Update shows 0% and won't budg...

Fix Nginx Upstream Connection Refused in Proxy Pass