Checklists for software errors, setup, and tool workflows.

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Latest checklists

You're in the middle of a Git operation and suddenly you see:

fatal: Unable to ...

Windows 11 Update Stuck at 0%: Manual Download Fix
You click 'Check for updates' in Windows 11, and it hangs at 0% for minutes or hours. Res...

Fix VS Code Git Authentication Failed Keychain Error
If you see "Git authentication failed" in VS Code on macOS, the problem is often the macO...

How to Fix Git Push Rejected (Non Fast-Forward Error)
When you run git push and see ! [rejected] with non fast-forward<...

Fix Git SSL Certificate Error: Unable to Get Local Issuer
If you see the error fatal: unable to access 'https://...': SSL certificate problem...

Docker Compose Ports Not Working: Common Fixes
You've defined ports in your docker-compose.yml, but containers aren't reachable on the e...