title: Combine files in one
body: <p>Currently I am in this directory-</p>
  
  <pre><code>/data/real/test
  </code></pre>
  
  <p>When I do <code>ls -lt</code> at the command prompt. I get like below something-</p>
  
  <pre><code>REALTIME_235000.dat.gz
  REALTIME_234800.dat.gz
  REALTIME_234600.dat.gz
  REALTIME_234400.dat.gz
  REALTIME_234200.dat.gz
  </code></pre>
  
  <p>How can I consolidate the above five <code>dat.gz files</code> into one <code>dat.gz file</code> in Unix without any data loss. I am new to Unix and I am not sure on this. Can anyone help me on this?</p>
  
  <p><strong>Update:-</strong></p>
  
  <p>I am not sure which is the best way whether I should unzip each of the five file then combine into one? Or 
  combine all those <code>five dat.gz</code> into one <code>dat.gz</code>?</p>