title: change part of file name grep or rename
body: <p>I have various files that are names </p>
  
  <blockquote>
    <p><code>"type_featAtype_featB"</code></p>
  </blockquote>
  
  <p>and </p>
  
  <blockquote>
    <p>"type_featAtype_featC"</p>
  </blockquote>
  
  <p>I need that all </p>
  
  <blockquote>
    <p>"type_featA"</p>
  </blockquote>
  
  <p>are replaced with </p>
  
  <blockquote>
    <p>"START"</p>
  </blockquote>
  
  <p>so the new names of the folders would be called </p>
  
  <blockquote>
    <p>"STARTtype_featB"</p>
  </blockquote>
  
  <p>and </p>
  
  <blockquote>
    <p>STARTtype_featC"</p>
  </blockquote>
  
  <p>.</p>
  
  <p>I have been looking at the rename function <a href="http://www.debian-administration.org/articles/150" rel="nofollow noreferrer">here</a> and <a href="https://stackoverflow.com/questions/1392768/rename-part-of-filename">here</a></p>
  
  <p>However, not all of my files have the same suffix, in fact they all have different suffixes as indicated in the example. </p>
  
  <p>Thus, I am looking for insight on how to use a command to replace just a part of the file name, as indicated above in one folder where each file had a unique suffix.
  Thank you</p>
  
  <p>Thank you in advance for any help.</p>