The comm is a command that compares two sorted files
line by line and writes the output: the lines they have in common and the lines that are unique.
Here we have two files named example1.txt and
example2.txt that each contain 5 elements, to test this command: example1.txt
Icecream
Chocolate
Cake
Candy
Biscuit
example2.txt
Bread
Chocolate
Tomato
Candy
Pizza
The syntax command is:
comm [flag] [file1] [file2]
comm example1.txt example2.txt
Icecream
Chocolate
Cake
Tomato
Candy
Biscuit
Pizza
The elements of the first file have less indentation.
The elements of the second file are more indented
The elements in common are even more indented than those of the second file.