COMM(1)                     General Commands Manual                    COMM(1)

NAME
       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.

SYNOPSIS
       comm [OPTION]... FILE1 FILE2

DESCRIPTION
       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.

OPTIONS
       -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>


VERSION
       v(uutils coreutils) 0.11.0

                                  2026-09-01                           COMM(1)