How to : Find duplicate number from file? with bash

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# 1  
How to : Find duplicate number from file? with bash

# 2  

What is the format of the file?

What do you want to output? The duplicates? Only one instance of every number? The non-duplicated numbers?
# 3  
Hammer & Screwdriver Without seeing your data, here is one possible solution

> cat file97
> sort -n file97 | uniq -c | awk '$1>1 {print $2}'

# 4  
sort | uniq -d is enough
# 5  
Updated:File Format



from above file i want to print duplicate lines...?
# 6  

Those five lines are unique.
Or, are you referring to the number after the : delimiter?
# 7  
yes i m refereeing the number after delimiter.

Simple example


Then output should be


Thanks for your quick response.
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