anchor.diff:  
   [index]
   == other utils
  -==== file
  +=== file
   *get basic file information on a file(s).*
   
   basic syntax:
  
positive.code: 
  [index]
  == linux ipc
  ==== ipcs
  *provides information on system inter process communication.*
  
  ----
  
negative.code:  11587 3290  3 17:41 ?        00:00:00 ~/foo/bar
  ----
  
  === ipcrm
  *use this command to remove shared memory, message queue, or semaphore.*
  
  remove shared memory by id
  