Workflow manuals for setup steps, repeatable tasks, and software operations.

Fix Cloudflare Origin Certificate with Let's Encrypt

If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...

Fix Docker Permission Denied Errors on Ubuntu

You start a Docker container with a mounted volume, and get a permission denied error when the co...

How to Remove an Existing Git Remote Origin

If you've cloned a repository or added a remote origin that you no longer need—or if you need...

How to Fix Cloudflare Origin Certificate Invalid Error

If you see a Cloudflare origin certificate invalid error, your browser or server is rejecting the...

Fix 'fatal: refusing to merge unrelated histories' in Bitbucket

You're working with a Bitbucket repository and when you try to merge two branches, Git throws...

Checklist for Troubleshooting Nginx Permission Denied Errors

Understanding the Problem

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