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    @ Prince John Wesley : Thank U very much, it's absolutely working fine. Commented Jun 4, 2012 at 7:50
  • Yeah, it ws mismatch with the line number. Bt ur command is absolutely perfect. Thank U very much. What does the symbol -F denote here ? Is the symbol '|' used to concat the two sommands ? Commented Jun 4, 2012 at 7:52
  • remove -F if you want to treat your input as regex pattern. -F helps to treat the input string as plain text. Commented Jun 4, 2012 at 7:54
  • Is the symbol '|' used to concat the two commands grep & sed ? Commented Jun 4, 2012 at 7:56
  • Thank U very much Prince John Wesley. It's really helped me alot. Keep ur support. I'm very new to this forum. Any suggestions to improve are most welcome. Commented Jun 4, 2012 at 8:00