The "comm" Utility
July 19, 1998
The "comm" utility is used to either display or censor
equivalent lines that appear in two files.
The "comm" utility uses columns to differentiate in which file
a unique or shared terms can be found. The first column is used to list
items unique to the first file. The second column is used to display
terms unique to the second file. And the third column is used to list
items common to both. The "comm" utility has several interesting options
to modify the column displays.
| Option |
Explanation |
| -1 |
Instructs the utility to not display column one |
| -2 |
Instructs the utility to not display column two |
| -3 |
Instructs the utility to not display column three |
Consider these examples:
![[Comm examples]](Images/comm.gif)
The "diff" Utility
Introduction to UNIX for Web Developers | Table of Contents
The "uniq" Utility
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