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The filename ``-'' means the standard input.
The following options are available:
| |
Suppress printing of column 1, lines only in file1. | |
| |
Suppress printing of column 2, lines only in file2. | |
| |
Suppress printing of column 3, lines common to both. | |
| |
Case insensitive comparison of lines. | |
Each column will have a number of tab characters prepended to it equal to the number of lower numbered columns that are being printed. For example, if column number two is being suppressed, lines printed in column number one will not have any tabs preceding them, and lines printed in column number three will have one.
The comm utility assumes that the files are lexically sorted; all characters participate in line comparisons.
The
COMM (1) | December 12, 2009 |
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“ | LISP = Lots of Irritating Silly Parentheses | ” |