Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git pull or git merge and get:

fatal: refusing to...

Fix Nginx Upstream Connection Refused Error
If you see upstream connection refused in your Nginx error logs, it means Nginx trie...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost
When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Fix Docker Build Context Canceled by Symlink Errors
If you see context canceled during a docker build and you have symlinks...

How to Fix Git Index Lock File Exists Error
If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...

Cloudflare SSL Full Strict Error 525 Fixes
If you see Error 525: SSL handshake failed when using Cloudflare with SSL set to...