Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

If you see fatal: Unable to create 'path/to/.git/index.lock': File exists., ...

You run git push and get an error like ! [rejected] main -> main (non-fast-...

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...

Fixing Docker Pull Access Denied in Docker Desktop
You try to pull a Docker image in Docker Desktop and see access denied. This usually...

Docker Container Exits Immediately in Docker Compose
If your Docker container exits immediately after starting with docker compose up, it...

How to Fix Git Index Lock File Exists Error
If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...