Checklists for software errors, setup, and tool workflows.

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

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

How to Generate a Cloudflare Origin Certificate

If you're using Cloudflare as a reverse proxy, you may want to encrypt traffic between your s...

How to Recover from a Detached HEAD in Git After a Rebase

You're in the middle of a rebase, you see a message like 'detached HEAD', and you'...

Fix Cloudflare 522 Error with Nginx Configuration

You're seeing a Cloudflare 522 error: connection timed out between Cloudflare and your origin...

How to Fix Windows Update Error 0x800f081f

Error 0x800f081f typically appears when you try to install a Windows update, especially a cumulat...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround

You try to merge two Git branches and get this error:

fatal: refusing to merge unre...