title: The sort -R command doesn't sort lines randomly in Linux
body: <p>I can't get --random-sort to work with the sort command on a Fedora Linux-system.</p>
  
  <p>Some context information:</p>
  
  <pre><code>$ cat /etc/fedora-release
  Fedora release 7 (Moonshine)
  $ which sort
  /bin/sort
  $ man sort | grep -A 2 '\-R'
         -R, --random-sort
                sort by random hash of keys
  
  $ man sort | grep -A 3 '\-R'
         -R, --random-sort
                sort by random hash of keys
  
         --random-source=FILE
  </code></pre>
  
  <p>And the test:</p>
  
  <pre><code>$ echo -e "2\n1\n3\n5\n4"
  2
  1
  3
  5
  4
  $ echo -e "2\n1\n3\n5\n4" | sort -r # Sort in reverse order
  5
  4
  3
  2
  1
  $ echo -e "2\n1\n3\n5\n4" | sort -R # Sort in random order
  1
  2
  3
  4
  5
  $ # Fail! That's not random (I've tried it multiple times.)
  </code></pre>