NAME
comm – select or reject lines common to two sorted files

SYNOPSIS
comm [ –123 ] file1 file2

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.

EXAMPLE
comm –12 file1 file2
Print lines common to two sorted files.

SOURCE
/sys/src/cmd/comm.c

SEE ALSO
sort(1), cmp(1), diff(1), uniq(1)
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