Practical fixes for tool errors, setup blocks, and workflow issues.

Fix Python Permission Denied on pip install --no-cache-dir

You try to install a Python package with pip install --no-cache-dir somepackage and ...

Fix Python Permission Denied When Installing Virtualenv with Pip

When you run pip install virtualenv and see a Permission denied err...

Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules

You run npm install or npm start and get something like:

...