How to print the lines which are repeated 3 times in a file?

Shell Programming and Scripting
1

Hello All, I have a file which has repeated lines. I want to print the lines which are repeated three times.

Please help.

2

try below

 
awk '{A[$0]++}END{for (i in A){if(A==3){print i}}}' filename
3 
awk '++A[$0]==3' file
4

Many thanks Vidyadhar & Yoda for your help...

I tried Yoda's code as it looked smaller & worked perfectly..

Now I need one more help.. It definitely should be another thread..