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http://codegolf.stackexchange.com/a/28425/8766

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May 23rd, 2014
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  1. $ gvim Hello\ World&sleep 3;kill $!
  2. sh: 1: kill: No such process
  3.  
  4. [1] + Done                       gvim Hello World
  5. $ ps -A | grep gvim
  6. 17748 ?        00:00:00 gvim
  7. $ echo $!
  8. 17745
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