Checklists for software errors, setup, and tool workflows.

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

You run git clone https://example.com/repo.git and get:

fatal: unable to acc...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

How to Create a New Branch from a Detached HEAD in Git

If you see a message like "You are in 'detached HEAD' state" in Git, it means you...

Chrome Sync Not Working on School Chromebook: Fixes

If your Chrome browser isn't syncing bookmarks, passwords, or history on a school Chromebook,...

Checklist for Troubleshooting Nginx Permission Denied Errors

Understanding the Problem

When Nginx returns a 403 Forbidden or logs an error like ...