Linux comm command
Linux comm command is used to compare two files have been sorted.
This directive will be one column to compare two sorted files of difference, and the result is displayed, if you do not specify any parameters, the result will be divided into 3 lines: Line 1 is only the first appears in a document column over a column, the second line is the only appears in the first two files off the first line 3 is in the 1st and 2nd file columns have appeared. If the file name is given as "-", the comm instruction data is read from the standard input device.
grammar
comm [-123][--help][--version][第1个文件][第2个文件]
Parameters:
- -1 Is not displayed in the first column appears only one document before.
- -2 Does not display the column only in the first two files before.
- -3 Not display column appears only in the first and second document before.
- --help online help.
- --version display version information.
Examples
File contents aaa.txt and bbb.txt follows:
[root@localhost text]# cat aaa.txt aaa bbb ccc ddd eee 111 222 [root@localhost text]# cat bbb.txt bbb ccc aaa hhh ttt jjj
<p>执行 comm 命令输出结果如下：</p>
[root@localhost text]# comm aaa.txt bbb.txt
aaa
bbb
ccc
aaa
ddd
eee
111
222
hhh
ttt
jjj
第一列 第二列 第三列
The first column contains only output that appears in aaa.txt row, the second row contains the column that appears in bbb.txt, the third column contains aaa.txt and bbb.txt in the same row. Each column is the tab character (\ t) as delimiters.