查找两个文件夹之间的公用文件 [英] Find common files between two folders

问题描述

给出两个根文件夹A和B，

Given two root folders A and B,

如何在A和B的子文件夹之间找到重复的文本文件?

how can I find duplicate text files between subfolders of A and of B ?

换句话说，我正在考虑A和B中文件的交集.

In other words, I am considering the intersection of files from A and B.

我不想在A或B中找到重复的文件，而只希望在A和B中找到文件.

I dont want to find duplicate files within A, or within B, but only files, that are in A and in B.

修改

重复是指文件内容相同

推荐答案

如注释部分所述，我将为每个文件生成一个MD5校验和，仅生成一次-然后查找重复的校验和.

As indicated in the comments section, I would generate a single MD5 checksum for each file, just once - then look for duplicated checksums.

类似这样的东西:

find DirA -name \*.txt -exec md5sum {} +  > /tmp/a
find DirB -name \*.txt -exec md5sum {} +  > /tmp/b

现在找到两个文件中都出现的所有校验和.

Now find all those checksums that occur in both files.

因此，遵循以下原则:

awk 'FNR==NR{md5[$1];next}$1 in md5' /tmp/[ab]

或者也许像这样:

awk 'FNR==NR{s=$1;md5[s];$1="";name[s]=$0;next}$1 in md5{s=$1;$1="";print name[s] " : " $0}' /tmp/[ab]

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