| .TH COMM 1 | |
| .CT 1 files | |
| .SH NAME | |
| comm \- select or reject lines common to two sorted files | |
| .SH SYNOPSIS | |
| .B comm | |
| [ | |
| .B -123 | |
| ] | |
| .I file1 file2 | |
| .SH DESCRIPTION | |
| .I Comm | |
| reads | |
| .I file1 | |
| and | |
| .IR file2 , | |
| which are in lexicographical order, | |
| and produces a three column output: lines only in | |
| .IR file1 ; | |
| lines only in | |
| .IR file2 ; | |
| and lines in both files. | |
| The file name | |
| .L - | |
| means the standard input. | |
| .PP | |
| Flag | |
| .LR 1 , | |
| .LR 2 , | |
| or | |
| .LR 3 | |
| suppresses printing of the corresponding | |
| column. | |
| .SH EXAMPLE | |
| .TP | |
| .EX | |
| comm -12 file1 file2 | |
| .EE | |
| .IP | |
| Print lines common to two sorted files. | |
| .SH SOURCE | |
| .B \*9/src/cmd/comm.c | |
| .SH "SEE ALSO" | |
| .IR sort (1), | |
| .IR cmp (1), | |
| .IR diff (1), | |
| .IR uniq (1) |