title: How to remove duplicate words from a plain text file using unix commands on windows
body: <p>I have a plain text file with words, which are separated by comma, for example:</p>
  
  <pre><code>word1, word2, word3, word2, word4, word5, word 3, word6, word7, word3
  </code></pre>
  
  <p>i want to delete the duplicates and to become:</p>
  
  <pre><code>word1, word2, word3, word4, word5, word6, word7
  </code></pre>
  
  <p><a href="https://stackoverflow.com/q/952268/648597">There is a realy good article for Linux already</a> So i installed gnuwin .... an gave up after a 1 h ....</p>