The use of Comm

1, the function of Comm

Row by line comparison of two sorted text files
Basic usage: Comm-[123] File1 file2

2. Example

1) display two text files all rows
#comm -12 file1 file2

2) Show file1 rows in the File2, and unique rows in the
#comm-3 File1 file2

3) Show unique rows in File1
#comm -23 file1 file2

4) Show unique rows in File2
#comm -13 file1 file2

5) Show rows in all two files
#comm -12 file1 file2

3. Attention

1) 1 represents a single row in the File1, 2 represents a single row in File2, 3 means that file1 and file2 have rows
2)-Indicates no display,
3)-and the combination of the lines to be displayed

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The use of Comm