Checklists for software errors, setup, and tool workflows.

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Fix Git index.lock File Exists Permission Denied Error

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

fatal: Unable to ...

Fix Nginx Configuration Test Failure on Location Directive
When you run nginx -t and see an error like [emerg] invalid location directive...

Fix VSCode Terminal Not Opening with Python
You try to run a Python script in VSCode, click the terminal tab, and nothing happens—or the term...

Fix VS Code 'Permission Denied' When Saving Files
You're editing a file in Visual Studio Code, hit Ctrl+S, and get an error: "Failed to sav...

Clear Chrome Certificate Cache to Fix NET::ERR_CERT_AUTHORITY_INVALID
When you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome, it usually means the browser...

Fix Chrome Black Screen on Mac: Hardware Acceleration Issue
You open Chrome on your Mac, and the screen goes black—or parts of the page are garbled. This oft...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git index.lock File Exists Permission Denied Error

Fix Nginx Configuration Test Failure on Location Directive

Fix VSCode Terminal Not Opening with Python

Fix VS Code 'Permission Denied' When Saving Files

Clear Chrome Certificate Cache to Fix NET::ERR_CERT_AUTHORITY_INVALID

Fix Chrome Black Screen on Mac: Hardware Acceleration Issue

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