The "-n" option in your one-liner does the file reading for you.
Your call to "system" is meaningless , so please take that out.
You will need to READ the INfile using something like <INFILE>.
You can track the record number with $. .
Write to the outfile using "print OUTFILE ...".
Please read the perl documentation on how to read and write files - these are documented along with the "open" function.
I hope life isn't a big joke, because I don't get it.
-SNL
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