title: kernel update via /dev/mtd
body: <p>I'm working on embedded device where kernel image is stored inside /dev/mtd4 part of flash.
  I would like to update this kernel without Uboot.</p>
  
  <p>How is it possible ?
  I was trying to call:</p>
  
  <pre><code>echo ./kernel.bin &gt; /dev/mtdblock4 
  </code></pre>
  
  <p>but it doesn't work. Stored data are not recognized as kernel in next boot.</p>