Plan 9 /sys/man/1/comm

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


	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.