comm - Online in the Cloud

PROGRAM:

NAME

comm - compare two sorted files line by line

SYNOPSIS

comm [OPTION]... FILE1 FILE2

DESCRIPTION

Compare sorted files FILE1 and FILE2 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)

--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

--output-delimiter=STR
separate columns with STR

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

--help display this help and exit

--version
output version information and exit

Note, comparisons honor the rules specified by 'LC_COLLATE'.

EXAMPLES

comm -12 file1 file2
Print only lines present in both file1 and file2.

comm -3 file1 file2
Print lines in file1 not in file2, and vice versa.

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