Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you performed a clean boot to troubleshoot an issue and later found that Windows Update won...

You start a Docker container and it exits immediately with a message like /bin/sh: 1: somec...

How to Give VS Code Permission to Save Files
If VS Code shows a permission error when you try to save a file, the problem is usually that the ...

How to Fix the Git index.lock File Exists Error
You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

How to Enable Breakpoints in VS Code
If you've set a breakpoint in Visual Studio Code and it's not being hit, or you're no...

Fix Git Push Rejected: Non-Fast-Forward Error
You try to push a commit to a remote repository and get: ! [rejected] main -> main (non-...