I have raspberry pi with Raspbian. When I entered
bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)
then it is showing the node-red is already installed. While when I am entering "node-red-start", it shows command not found.
The npm version is v6.4.1 and the node version is v11.0.0