What is the best online tutorial to learn Nodejs?

definitely nodeschool

its free , interactive  and work offline 

and the second resource i got is this great book 

node beginner

i recommend you to do both 

 this is a link of an excelent tutorial 

node JS Tutorial

For Basics 

Please follow: https://www.tutorialspoint.com/nodejs/

once you finish this you can see the NodeJs Documentation.

If you want any sample projects you can get from GitHub.

These are the things I followed if I want to learn new languages.

Learn You The Node.js For Much Win!

Learn Node JS in a Week

Felix's Node.js Guide

Node Tuts

There is a good tutorial for French speaker here : https://openclassrooms.com/courses/des-applications-ultra-rapides-avec-node-js/node-js-mais-a-quoi-ca-sert

Otherwise, you'll find here top 10 best nodeJS tutorials

http://noeticforce.com/best-nodejs-tutorial-with-examples

hello ,

I studied the following course from :

https://www.pluralsight.com/

and here is some links that may help you :

http://www.haneycodes.net/to-node-js-or-not-to-node-js/

http://www.innofied.com/node-js-best-practices/

http://packagequality.com/

http://book.mixu.net/node/ch6.html

if you need more help don't hesitate to contact me.

BR,

Mostafa Attia