title: how to fix "file.cmpr: unknown suffix -- ignored"
body: <p>I am trying to write a bash script that takes a .cmpr compressed file and uncompress it. </p>
  
  <p>I've tried running the following command in the shell to see if it works - </p>
  
  <pre><code>uncompress file.cmpr
  </code></pre>
  
  <p>but the file is not being uncompressed and I get the following message -</p>
  
  <pre><code>gzip: file.cmpr: unknown suffix -- ignored
  </code></pre>
  
  <p>I want to use the 'uncompress' command as specified in here - 
  <a href="http://man7.org/linux/man-pages/man1/uncompress.1p.html" rel="nofollow noreferrer">http://man7.org/linux/man-pages/man1/uncompress.1p.html</a></p>
  
  <p>how do I fix this? how to I add support for '.cmpr' files on my machine? or is it something else</p>