title: how to replace char with other in hexdecimal
body: <p>I'm a new user who using mainframe, I have a file and I need to change all dots '.' in file with space, I was trying to write this statement on command </p>
  
  <pre><code>change X'05' X'40' all  
  </code></pre>
  
  <p>after I converted the file to hexdecimal, but It doesn't work. 
  How can I change all the dots with space in file, in simple way please? </p>