title: what in deference between node and node js?
body: <p>I installed nodejs as per this documentation 
  <a href="https://nodejs.org/en/download/package-manager/" rel="nofollow noreferrer">https://nodejs.org/en/download/package-manager/</a>  </p>
  
  <p>then I checked i current version of Node js</p>
  
  <p>:~/Downloads$ nodejs -v</p>
  
  <p>v4.2.6</p>
  
  <p>Still Older version of Nodejs</p>
  
  <p>then I tried to install node via nvm
  as per this documentation <a href="https://askubuntu.com/questions/849270/how-can-i-install-a-tar-xz-file-from-nodejs-org">https://askubuntu.com/questions/849270/how-can-i-install-a-tar-xz-file-from-nodejs-org</a></p>
  
  <p>I got newest version of Node 
  :~/Downloads$ node -v
  v7.9.0</p>
  
  <p>But When I checked version of nodejs , got still old version of nodejs.
  I just confused about difference bewtween nodejs and node .</p>
  
  <p>thanks in advance if any one help me to install latest version of Nodejs via ppa or by tar.xz file, I already tried each solution.</p>