How to install node on Ubuntu

Node.js v11.x:

$ curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
$ sudo apt-get install -y nodejs

Node.js v10.x:

$ curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
$ sudo apt-get install -y nodejs

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