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Got it! Thanks!

Perfect! Thank you!

---------- Post updated at 08:05 PM ---------- Previous update was at 12:26 AM ----------



Please, Don Cragun, can you explain it? I suppose you create a list, and add...

Thanks to all.

And if I am interested in the rate?

$ cat f28
a1
a2
a1
a3
a1
a2
a4
a5
3/8

Hi Don Cragun,

It is not a homework, I know it has to be easy to do but I don't find the correct way.

I know how to obtain the duplicates number for each line:

sort file.txt | uniq -c -d
...

Hi all,

I have found another post threads talking about count duplicate lines, but I am interested in obtain the total number of duplicates. For example:

#file.txt
a1
a2
a1
a3
a1
a2
a4...