在文件中查找重复行并计算每行重复了多少次? [英] Find duplicate lines in a file and count how many time each line was duplicated?

问题描述

假设我有一个类似于以下的文件:

Suppose I have a file similar to the following:

123 
123 
234 
234 
123 
345

我想知道123"被复制了多少次，234"被复制了多少次，等等.所以理想情况下，输出应该是:

I would like to find how many times '123' was duplicated, how many times '234' was duplicated, etc. So ideally, the output would be like:

123  3 
234  2 
345  1

推荐答案

假设每一行有一个数字:

Assuming there is one number per line:

sort <file> | uniq -c

您也可以在 GNU 版本中使用更详细的 --count 标志，例如在 Linux 上:

You can use the more verbose --count flag too with the GNU version, e.g., on Linux:

sort <file> | uniq --count

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