In most cases you are behind a proxy or have bad network settings - NodeJS & NPM

Npm install will not work, if you are behind the proxy server. If you try to use any npm install command then you will get the following errors.

• You are behind a proxy or have bad network settings
• Tunneling socket could not be established cause=getaddrinfo ENOTFOUND

So you need set the http-proxy & https-proxy in nodejs configuration file using following commands.

​npm config set proxy http://ex-proxy.com:8080
npm config set http-proxy http://ex-proxy.com:8080
npm config set https-proxy https://ex-proxy.com:8080

If still have same issues then close your command line window, and open it. Then try with npm install command