Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When a scheduled task fails with a DNS error, it usually means the task cannot resolve a hostname...

You open Windows Security and see a message that the service isn't running. The shield icon in th...

If you see fatal: unable to access 'https://...': SSL certificate problem: certificate veri...

Fix pip SSL Certificate Error in Python on Windows, macOS, Linux
You run pip install somepackage and get an SSL certificate error: certificate ...

Fix Apache Error 1067: Server Fails to Start
When Apache fails to start with error 1067 on Windows, the service terminates unexpectedly. This ...

Stop systemd Service from Restarting in a Loop
If you have a systemd service that keeps restarting repeatedly — sometimes every few seconds — it...