Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

Fix git index.lock File Exists Error on Windows
If you see fatal: Unable to create 'index.lock': File exists. when running G...

How to Remove the Externally Managed Environment Flag in pip
If you're seeing error: externally-managed-environment when using pip on a moder...

How to Check Node Version Compatibility with a Package
You're about to install or update a package, and you see warnings like "requires Node.js ...

Fix Chrome Crashing on Startup in Windows 10
If Chrome crashes immediately or shortly after launching on Windows 10, the cause is often a corr...

Fix Git 'index.lock' File Exists Error on Linux
When working with Git on Linux, you might see an error like:
fatal: Unable to creat...