I´ve just created a file called repetitive.txt on my Cygwin system and used perl, v5.6.1 to try your one liner but it gave an error:

Can't do inplace edit on repetitive.txt: Permission denied.

And to my surprise the file was deleted. What can be the reason of that behaviour? Did I miss something?

In reply to Re: Re: Removing repeated lines from file by YAFZ
in thread Removing repeated lines from file by matth

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