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How to findDuplicate Records in a text file

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# 1  
Old 10-17-2008
How to findDuplicate Records in a text file
Pls
Any one help me in
# 2  
Old 10-17-2008
sort file | uniq -d

(Might be applicable only to GNU uniq. The -d option prints only duplicate lines.)
Last edited by otheus; 10-17-2008 at 05:59 AM.. Reason: clarify answer
# 3  
Old 10-17-2008
Code:
sort file | uniq -c |sort

first the file will be sorted and
uniq -c will group all the receords based on the values/line and the count.
Again if you sort,

it will display the duplicate records at the bottom and will show how many no of times it occurs in that file.
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