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

How to Allow Unrelated Histories in Git Merge

Fix Nginx Configuration Test Failed on Ubuntu

When you run nginx -t on Ubuntu and get an error, Nginx won't reload or restart....

Fix 'Permission Denied' When Installing Python Packages Without sudo

If you see "Permission denied" when running pip install, you're not alon...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

Git index.lock File Exists: Quick Fix Checklist

You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...