title: raspberry pi - Why can't I boot the system after shutdown?
body: <p>I have a raspberry pi 3.</p>
  
  <p>Whenever I want to shutdown, I always execute this command:</p>
  
  <pre><code>sudo shutdown -h now
  </code></pre>
  
  <p>And I will wait until only the red light is lighting. (And I always remove the power until only the red light is lighting) </p>
  
  <p>But the problem is : every time I shutdown, I can't boot it again. I need to install the OS into the SD card again every time after I shutdown.</p>
  
  <p>If anyone has the same problem ? Please help me. Thanks a lot.</p>