title: How to overwrite some bytes of a binary file with dd?
body: <p>I have a binary file and i want to replace the value <code>A2</code> at address <code>DEADBEEF</code> with some other value, say <code>A1</code>.</p>
  
  <p>How can I do this with <code>dd</code>? If there are other tools that can do this, please suggest. But I plan to do this on iPhone so I can only work with most basic Unix tools.</p>