title: How long should Unix cat command take?
body: <p>I am joining about 20 files with a total size of 40Gb using the following command.</p>
  
  <pre><code>cat hda1.ntfs-ptcl-img.gz.* &gt; hda1.ntfs-ptcl-img.gz
  </code></pre>
  
  <p>Just wondering how long this process should usually take as it has been running for some time now.</p>
  
  <p>Thanks.</p>