title: Using UNIX is there a way to sort columns 4 and 5, remove the duplicates, but still count the total for each
body: <p>Like the title says, I am able to filter the results using this command: sort -t "," -k5 -nr  data.csv | cut -d "," -f4,5 </p>
  
  <p>I get results like:</p>
  
  <pre><code>DISEASES OF HEART,5351
  DISEASES OF HEART,4495
  MALIGNANT NEOPLASMS,3438
  MALIGNANT NEOPLASMS,3408
  MALIGNANT NEOPLASMS,1540
  INFLUENZA AND PNEUMONIA,707
  INFLUENZA AND PNEUMONIA,614
  CHRONIC LOWER RESPIRATORY DISEASES,502
  CHRONIC LOWER RESPIRATORY DISEASES,388
  CEREBROVASCULAR DISEASE,382
  HUMAN IMMUNODEFICIENCY VIRUS DISEASE,297
  CEREBROVASCULAR DISEASE,276
  
  </code></pre>
  
  <p>But I am trying to combine the causes of death while also adding their death counts. </p>
  
  <p>I am a total newbie, so I am trying to stick to basic sort commands. </p>