Checklists for software errors, setup, and tool workflows.

Fix DNS Probe Finished NXDOMAIN on Chrome for Android

If you see the error 'DNS_PROBE_FINISHED_NXDOMAIN' in Chrome on your Android phone, it me...

Cloudflare Origin Certificate Not Showing in Dashboard: Fix

If you've generated a Cloudflare origin certificate but it doesn't appear in your dashboa...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fixing VSCode IntelliSense Not Working for Go

You open a Go project in VSCode, start typing, and get no autocompletions, no hover info, no erro...

Fix Git index.lock File Exists Permission Denied Error

You're in the middle of a Git operation and suddenly you see:

fatal: Unable to ...