comm
Show common and unique lines between two sorted files
Usage: comm file1 file2
Standard Input: Only used if file1 or file2 is a dash (–)
Standard Output: Used to display results col 1 shows lines only in file1.
col 2 shows lines only in file2.
col 3 shows lines in common.
SEE ALSO
 | For more information, see page 261 |
Useful options:
-1 means suppress col 1 (lines only in file1).
-2 means suppress col 2 (lines only in file2).
-3 means suppress col 3 (common lines).
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