You could also do it in a compact command line manner
To find only the duplicate enteries
perl -ne 'print if $h{$_}++' filename
To find unique data
perl -ne 'print unless $h{$_}++' filename
Of course , you could simply do cat filename | uniq at the shell prompt for the second case.
HTH,
chimni

In reply to Re: finding duplicate data by chimni
in thread finding duplicate data by harry34

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