title: removing duplicate lines from file /grep
body: <p>I want to remove all lines where all the second column  05408736032 are same</p>
  
  <p>0009300|05408736032|89|01|001|0|0|0|1|NNNNNNYNNNNNNNNN|asdf| 0009367|05408736032|89|01|001|0|0|0|1|NNNNNNYNNNNNNNNN|adff|</p>
  
  <p>these lines are not consecutive. Its fine to remove all the lines . I dont have to keep one of them around. </p>
  
  <p>Sorry my unix fu is really weak from non  usage :) .</p>