03-28-2013
Thx.
you said it dose not have any sence but still i wnat to understand the meaning of this command.
I did not get what the meaning of this '[^A-Da-f]' all characters that are not in between that range of A to D only or A-D plus a-F? and if this means only A to D range ?
how '^[A-Da-f]' == '[^A-Da-f]'? or the not the same ?
Another thing the grep '^[A-Da-F]' function in the original syntax
(cat f1 >> f2 | grep '^[A-Da-F]')
suppose to look for those letters that r beyond the range in f2 and do what with them?
One more question the option that you offer :
it takes f1 filters the range and then place it at f2?
How dose filter work it takes words that dose not starts with the letters or do not have them at all or just placing the words without the letters leaving empty space?
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