Is there a way to test my proxy settings before running `npm install`?

You can use `curl` or `wget` with the proxy settings to test connectivity. For example: `curl -x http://proxy.server:port https://www.google.com`. If this command fails, it indicates a problem with your proxy configuration. This helps isolate whether the issue is with npm or the proxy itself. Replace `http://proxy.server:port` with your actual proxy settings.