How does linux repeat two files?

This article mainly explains "how to repeat two documents by linux". Friends who are interested might as well take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "how to repeat two files by linux"!

For example, if you have two genetic id files, what should you do if you want to know the id shared by these two files?

One line of command can solve the problem:

Cat File 1 File 1 | sort | uniq outputs the union of these two files

Cat File 1 File 1 | sort | uniq-d outputs the intersection of the two files

Cat File 1 File 1 | sort | uniq-u outputs the id where the file is deleted and intersected

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