如何从另一个文件 A 中删除出现在文件 B 上的行? [英] How to remove the lines which appear on file B from another file A?

问题描述

我有一个很大的文件 A(由电子邮件组成)，每封邮件一行.我还有另一个文件 B，其中包含另一组邮件.

I have a large file A (consisting of emails), one line for each mail. I also have another file B that contains another set of mails.

我将使用哪个命令从文件 A 中删除出现在文件 B 中的所有地址.

Which command would I use to remove all the addresses that appear in file B from the file A.

所以，如果文件 A 包含:

So, if file A contained:

A
B
C

和文件 B 包含:

B    
D
E

然后文件 A 应该留下:

Then file A should be left with:

A
C

现在我知道这是一个可能经常被问到的问题，但我只找到了 一个在线命令，它给了我一个错误的分隔符错误.

Now I know this is a question that might have been asked more often, but I only found one command online that gave me an error with a bad delimiter.

任何帮助将不胜感激！肯定有人会想出一个聪明的单线，但我不是 shell 专家.

Any help would be much appreciated! Somebody will surely come up with a clever one-liner, but I'm not the shell expert.

推荐答案

如果文件已排序(它们在您的示例中):

If the files are sorted (they are in your example):

comm -23 file1 file2

-23 抑制在两个文件中或仅在文件 2 中的行.如果文件未排序，首先通过 sort 管道它们...

-23 suppresses the lines that are in both files, or only in file 2. If the files are not sorted, pipe them through sort first...

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