title: NodeJS command "npm install -g" is not working?
body: <p>I am trying to run simple express server in node. But when I install the dependencies it's giving me error that node "Cannot find express". </p>
  
  <p>here is console logs </p>
  
  <pre><code>asus@DESKTOP-PL2TIDL MINGW64 /f/nitishWorkspace/nitishGitRepo/chatApp (master)
  $ npm install -g express
  express@4.14.0 C:\Users\asus\AppData\Roaming\npm\node_modules\express
  ├── array-flatten@1.1.1
  ├── escape-html@1.0.3
  ├── encodeurl@1.0.1
  ├── content-type@1.0.2
  ├── range-parser@1.2.0
  ├── fresh@0.3.0
  ├── path-to-regexp@0.1.7
  ├── cookie-signature@1.0.6
  ├── etag@1.7.0
  ├── content-disposition@0.5.1
  ├── vary@1.1.0
  ├── serve-static@1.11.1
  ├── methods@1.1.2
  ├── merge-descriptors@1.0.1
  ├── parseurl@1.3.1
  ├── cookie@0.3.1
  ├── utils-merge@1.0.0
  ├── depd@1.1.0
  ├── qs@6.2.0
  ├── on-finished@2.3.0 (ee-first@1.1.1)
  ├── finalhandler@0.5.0 (unpipe@1.0.0, statuses@1.3.0)
  ├── debug@2.2.0 (ms@0.7.1)
  ├── proxy-addr@1.1.2 (forwarded@0.1.0, ipaddr.js@1.1.1)
  ├── accepts@1.3.3 (negotiator@0.6.1, mime-types@2.1.11)
  ├── type-is@1.6.13 (media-typer@0.3.0, mime-types@2.1.11)
  └── send@0.14.1 (destroy@1.0.4, statuses@1.3.0, ms@0.7.1, mime@1.3.4, http-errors@1.5.0)
  
  asus@DESKTOP-PL2TIDL MINGW64 /f/nitishWorkspace/nitishGitRepo/chatApp (master)
  $ node server.js
  module.js:327
      throw err;
      ^
  
  Error: Cannot find module 'express'
      at Function.Module._resolveFilename (module.js:325:15)
      at Function.Module._load (module.js:276:25)
      at Module.require (module.js:353:17)
      at require (internal/module.js:12:17)
      at Object.&lt;anonymous&gt; (F:\nitishWorkspace\nitishGitRepo\chatApp\server.js:1:75)
      at Module._compile (module.js:409:26)
      at Object.Module._extensions..js (module.js:416:10)
      at Module.load (module.js:343:32)
      at Function.Module._load (module.js:300:12)
      at Function.Module.runMain (module.js:441:10)
  </code></pre>
  
  <p>I think the problem lies in these lines</p>
  
  <pre><code>express@4.14.0 C:\Users\asus\AppData\Roaming\npm\node_modules\express
  </code></pre>
  
  <p>and</p>
  
  <pre><code>asus@DESKTOP-PL2TIDL MINGW64 /f/nitishWorkspace/nitishGitRepo/chatApp (master)
  </code></pre>
  
  <p>As you can notice the path is different here. I think that the dependencies are getting install in different directory and node is not able to access that.
  How can I solve this problem ?</p>