title: How to run hello-world in Contiki OS?
body: <p>I am new to contiki os, I tried to compile and run hello-world.c file located in examples directory in contiki os 3.0. But I got the error,</p>
  
  <blockquote>
    <p>hello-world.c:40:21: fatal error: contiki.h: No such file or directory".</p>
  </blockquote>
  
  <p>I tried this in root user.</p>
  
  <p><a href="https://i.stack.imgur.com/ZjLj5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZjLj5.jpg" alt="enter image description here"></a> </p>
  
  <p>Any kind of help to run very beginner program in contiki is appreciated. </p>