title: EACCES: permission denied with Node JS
body: <p>I get below error when write a file (file name is book) with Node.js, could you please help?</p>
  
  <pre><code>Error: EACCES: permission denied, open '/book'
      at Object.openSync (fs.js:443:3)
      at Object.writeFileSync (fs.js:1163:35)
      at Object.&lt;anonymous&gt; (/home/ubuntu/remoteserver/ionicappGate.js:375:6)
      at Module._compile (internal/modules/cjs/loader.js:689:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
      at Module.load (internal/modules/cjs/loader.js:599:32)
      at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
      at Function.Module._load (internal/modules/cjs/loader.js:530:3)
      at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
      at startup (internal/bootstrap/node.js:266:19)
  </code></pre>
  
  <p>The code is as below</p>
  
  <pre><code>const fs = require('fs');
  const path = "/book";
  
  //do whatever required after initialize
  fs.writeFileSync(path, "hello book");
  app.use("/", router);
  
  app.listen(4000, () =&gt; console.log('Platform Server running on port 4000'))
  </code></pre>