Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see an error like fatal: Unable to create 'project/.git/index.lock': File ex...

Fix Git Lock File Not Deleted After Crash
If Git reports a lock file error after a crash, it usually means a previous Git operation was int...

Fix 'Permission Denied' Error When Using pip Install on Linux
When you run pip install somepackage on Linux and see Permission denied...

Fix 'Permission Denied' When Deleting Files in VS Code
You try to delete a file or folder in VS Code's Explorer, but get an error: Permission ...

Fix ERR_NAME_NOT_RESOLVED in Chrome Safe Mode
If you see ERR_NAME_NOT_RESOLVED in Chrome while browsing in safe mode (Incognit...

Python Requests: Fixing Connection Timeout with Proxies
You're using the Python requests library with a proxy, and you're seeing a <...