comm - Compare two sorted files line by line.

       Compare two sorted files line by line.

       When FILE1 or FILE2 (not both) is -, read standard input.

       With  no  options,  produce  three-column  output.  Column one contains lines unique to FILE1, column two
       contains lines unique to FILE2, and column three contains lines common to both files.

       comm - Compare two sorted files line by line.

       When FILE1 or FILE2 (not both) is -, read standard input.

       With  no  options,  produce  three-column  output.  Column one contains lines unique to FILE1, column two
       contains lines unique to FILE2, and column three contains lines common to both files.

-1     suppress column 1 (lines unique to FILE1)

       -2     suppress column 2 (lines unique to FILE2)

       -3     suppress column 3 (lines that appear in both files)

       --output-delimiter=STR
              separate columns with STR

       -z, --zero-terminated
              line delimiter is NUL, not newline

       --total
              output a summary

       --check-order
              check that the input is correctly sorted, even if all input lines are pairable

       --nocheck-order
              do not check that the input is correctly sorted

       -h, --help
              Print help

       -V, --version
              Print version

       <FILE1>

       <FILE2>

comm  [-1  ]  [-2  ]  [-3  ]  [--output-delimiter]   [-z|--zero-terminated]   [--total]   [--check-order]
       [--nocheck-order] [-h|--help] [-V|--version] <FILE1> <FILE2>

       v0.0.30

                                                   comm 0.0.30                                           comm(1)