Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After restarting nginx, you might see errors like connect() to unix:/var/run/php-fpm.sock f...

Docker Compose .env File Not Loading: Common Fixes
You set environment variables in a .env file next to your docker-compose.yml

Fix Cloudflare Error 521 After a Server Update
If you see Cloudflare error 521 after updating your server, the origin web server is refusing the...

Fix pnpm ERR_PNPM_OUTDATED_LOCKFILE Lockfile Error
When running pnpm install or pnpm update, you may see:
ER...

How to Fix Cloudflare 522 Error: Check Your Origin Server
If you're seeing a 522 Connection Timed Out error in your browser when visit...

How to Fix Git Clone Timeout with SSH Key
You run git clone [email protected]:user/repo.git and wait. After a while, you get a ti...