title: Command not found NDK
body: <p>I am using ubuntu and  trying to build a project  and I am using the following code:</p>
  
  <pre><code>cd &lt;project-directory&gt;/tess-two
  ndk-build
  android update project --path .
  ant release
  </code></pre>
  
  <p>When I type ndk-build it returns command not found.
  It returns command not found.I extracted the ndk bin file and made it a folder. Please help me out. </p>