There is a problem when npm install

I'm new to npm and Nodejs. The following error occur when I do npm install:

/bin/sh: 1: node: not found
gyp: Call to 'node -e "require('nan')"' returned exit status 127 while in binding.gyp. while trying to load binding.gyp


What should I do to continue it?

some info:
ubuntu 16.04
node v4.2.6
npm v3.5.2

Start with the reported npm install error and the repository's binding.gyp reference, then compare the stated Ubuntu, Node.js, and npm versions with the project's installation requirements. Reproduce the failure and identify why the install shell cannot find node; done means npm install completes successfully.

Written by the indexing model from the issue text.