checking duplicate entry in file

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# 1  
Old 09-01-2011
Error checking duplicate entry in file

Hi i have a file like

and the lines are having more than 10k.

do we have anycommand to check the duplicate entries in the file.

I applied the while loop by greping each line with whole file,
but it is taking huge amount of time as the file size is large.

do we have any efficient way?

thanks in advance

Last edited by radoulov; 09-01-2011 at 08:10 AM.. Reason: Please use code tags.
# 2  
Old 09-01-2011
What do you mean by "check duplicate entries"? Count them?
# 3  
Old 09-01-2011
Originally Posted by bartus11
What do you mean by "check duplicate entries"? Count them?
i mean duplicate rows.

---------- Post updated at 05:00 AM ---------- Previous update was at 04:59 AM ----------

i means duplicate rows.
# 4  
Old 09-01-2011
man uniq

But you have to sort the file before.
This User Gave Thanks to yazu For This Post:
# 5  
Old 09-01-2011
sort inputfile | uniq -c | sort -g -k1

# 6  
Old 09-01-2011
You can use excel to find uniq output. Or any keyword cleaner tools
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