How to use the comm command of Linux

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Prepare the files 1.txt and 2.txt

[h_chenliling@vm6-sj1-pro-had-32-107] $cat 1.txtabcdef1234567 [h _ chenliling@vm6-sj1-pro-had-32-107] $cat 2.txtdefghi1234567 [h _ chenliling@vm6-sj1-pro-had-32-107] $comm 1.txt 2.txtabc defgh i12345678910

The first column contains only the rows that appear in 1.txt, the second column contains the rows that appear in 2.txt, and the third column contains the same rows in 1.txt and 2.txt. Each column is delimited by a tab (\ t).

Intersection

Delete columns 1 and 2

[h_chenliling@vm6-sj1-pro-had-32-107] $comm 1.txt 2.txt-1-2def1234 difference set

The difference of 1.txt exists in 1.txt, but not in 2.txt. That is, delete columns 2 and 3.

[h_chenliling@vm6-sj1-pro-had-32-10710] $comm 1.txt 2.txt-2-3abc1234 difference

For different lines of two files, delete column 3 and merge column 1 and column 2

[h_chenliling@vm6-sj1-pro-had-32-10710] $comm 1.txt 2.txt-3 | sed's / ^\ t//'abcghi is about the article "how to use Linux's comm commands". I believe you all have some understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about it, please follow the industry information channel.