Checklists for software errors, setup, and tool workflows.

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Latest checklists

When you run npm install or npm start and see package.json not fo...

Fix 'Python Command Not Found' in Git Bash on Windows
When running Python in Git Bash on Windows, you may see bash: python: command not found

How to Recover from Detached HEAD in Git
You're working in a Git repository and suddenly see a message like 'You are in 'detac...

Fix Git Clone Connection Timed Out After 30 Seconds
When you run git clone and see connection timed out after 30 seconds, i...

Fix Git 'index.lock file exists' Error
When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

How to Fix Git Merge Unrelated Histories Error
You run git pull or git merge and get:
fatal: refusing to...