title: How to unpack xx.tar.z files types?
body: <p>I have installed a software that unpacks .zip and .tar files. However
  I was wondering how do you unpack this kind of files myxxx.tar.z?</p>
  
  <p>I have Tugzip installed but cannot open such .tar.z file format. 
  Also how do you zip such files?  </p>