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 NAME     
 |  |  |  | comm – select or reject lines common to two sorted files 
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 SYNOPSIS     
 |  |  |  | comm [ −123 ] file1 file2 
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 DESCRIPTION     
 |  |  |  | Comm reads file1 and file2, which are in lexicographical order,
    and produces a three column output: lines only in file1; lines
    only in file2; and lines in both files. The file name − means
    the standard input. 
    
    
    Flag 1, 2, or 3 suppresses printing of the corresponding column. 
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 EXAMPLE     
 |  |  |  | comm −12 file1 file2 
 |  |  |  | Print lines common to two sorted files. 
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 SOURCE     
 SEE ALSO     
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