Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're installing a package with pip, and suddenly you see a wall of red text: ERROR: C...

Fix DNS Probe Finished NXDOMAIN Error on Mac
You're browsing on your Mac and suddenly a site won't load, showing the error DNS...

Fix Chrome ERR_CONNECTION_RESET Caused by VPN
If you see ERR_CONNECTION_RESET in Chrome while your VPN is active, the connecti...

Fix Git Merge Conflicts When Stash Changes Are Involved
You're mid-merge, and Git tells you there's a conflict. But you also have stashed changes...

How to Fix Git Detached HEAD and Checkout a Branch
You're working in a Git repository, make some commits, and then realize you're in a '...

Fix Nginx Upstream Connection Refused Timeout Error
When Nginx returns 502 Bad Gateway or logs upstream connection refused timeout...