npm install bootstrap@4.0.0 command gives ENETUNREACH error

Question

I successfully used the create-react-app command, and the npm start command worked. But when I tried to install the bootstrap using npm install bootstrap@4.0.0 --save , it gave an "ENETUNREACH" error. I am using npm version 5.8.0, nodejs version 10.15.2 and Ubuntu 19.10
PS I am a complete beginner, and I am following an online react course.

Answer 1

it seems you are behind a proxy, you could do this

npm config set proxy null
npm config set https-proxy null
npm config set registry http://registry.npmjs.org/

The first two lines will remove proxy's if there any.

Third line will make npm download from the official package registry.

here's an article you could read on How to run npm Behind A Proxy Server - a step-by-step guide

It looks like current installed npm is not compatible with Node.js version you are using. You'll probably need to update your npm using

npm install npm@latest -g