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| [9] | 1 | .TH COMM 1
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| 2 | .SH NAME
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| 3 | comm \- print lines common to two sorted files
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| 4 | .SH SYNOPSIS
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| 5 | \fBcomm\fR [\fB\-123\fR] \fIfile1 file2\fR
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| 6 | .br
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| 7 | .de FL
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| 8 | .TP
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| 9 | \\fB\\$1\\fR
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| 10 | \\$2
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| 11 | ..
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| 12 | .de EX
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| 13 | .TP 20
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| 14 | \\fB\\$1\\fR
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| 15 | # \\$2
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| 16 | ..
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| 17 | .SH OPTIONS
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| 18 | .FL "\-1" "Suppress column 1 (lines present only in \fIfile1\fP)"
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| 19 | .FL "\-2" "Suppress column 2 (lines present only in \fIfile2\fP)"
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| 20 | .FL "\-3" "Suppress column 3 (lines present in both files)"
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| 21 | .SH EXAMPLES
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| 22 | .EX "comm file1 file2" "Print all three columns"
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| 23 | .EX "comm \-12 file1 file2" "Print only lines common to both files"
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| 24 | .SH DESCRIPTION
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| 25 | .PP
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| 26 | Two sorted files are read and compared.
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| 27 | A three column listing is produced.
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| 28 | Files only in
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| 29 | .I file1
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| 30 | are in column 1;
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| 31 | files only in
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| 32 | .I file2
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| 33 | are in column 2;
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| 34 | files common to both files are in column 3.
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| 35 | The file name \- means \fIstdin\fR.
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| 36 | .SH "SEE ALSO"
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| 37 | .BR cmp (1),
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| 38 | .BR diff (1),
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| 39 | .BR sort (1).
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