Use glob or opendir to get the file names. Use regexp match (see perlretut) to match the UNIX timestamp. Use localtime and array splicing to determine the date. Use open, readline (also <$filehandle>), print, close to manipulate file contents.
Sorry if my advice was wrong.

In reply to Re: Epoch get all files with same day by aitap
in thread Epoch get all files with same day by perlrush2011

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