Linux 给定两个目录树如何找到哪些文件相同？
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given two directory trees how to find which files are the same?
提问by fazineroso
I am writing a bash script, and I would like to know which files are the same in two directory trees.
我正在编写一个 bash 脚本，我想知道两个目录树中哪些文件是相同的。
It would be the opposite of using diff.
这将与使用差异相反。
Well i found the answer myself. I had tried it before, but I thought it did not work.
好吧，我自己找到了答案。我以前尝试过，但我认为它不起作用。
diff -srq dir1/ dir2/ | grep identical
采纳答案by fazineroso
Well i found the answer myself. I had tried it before, but I thought it did not work.
好吧，我自己找到了答案。我以前尝试过，但我认为它不起作用。
diff -srq dir1/ dir2/ | grep identical
What -srqmeans? From diff --help:
-srq是什么意思？从diff --help：
-s --report-identical-files Report when two files are the same.
-r --recursive Recursively compare any subdirectories found.
-q --brief Output only whether files differ.
回答by Todd A. Jacobs
You can use a utility like fdupesor rdfindto list duplicate files. For example:
您可以使用fdupes或rdfind等实用程序来列出重复文件。例如：
fdupes --recurse dir1 dir2
You might also want to use the --samelineflag to list all duplicates on the same line, rather than in text blocks, depending on how you want to parse the results.
您可能还想使用该--sameline标志在同一行而不是在文本块中列出所有重复项，具体取决于您希望如何解析结果。
