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OpenSolaris 2009.06 - man page for comm (opensolaris section 1)

comm(1) 				  User Commands 				  comm(1)

NAME
       comm - select or reject lines common to two files

SYNOPSIS
       comm [-123] file1 file2

DESCRIPTION
       The  comm  utility  reads  file1 and file2, which must be ordered in the current collating
       sequence, and produces three text columns as output: lines only in file1;  lines  only  in
       file2; and lines in both files.

       If the input files were ordered according to the collating sequence of the current locale,
       the lines written will be in the collating sequence of the original  lines.  If	not,  the
       results are unspecified.

OPTIONS
       The following options are supported:

       -1    Suppresses the output column of lines unique to file1.

       -2    Suppresses the output column of lines unique to file2.

       -3    Suppresses the output column of lines duplicated in file1 and file2.

OPERANDS
       The following operands are supported:

       file1	A  path  name of the first file to be compared. If file1 is -, the standard input
		is used.

       file2	A path name of the second file to be compared. If file2 is -, the standard  input
		is used.

USAGE
       See  largefile(5)  for  the  description  of  the behavior of comm when encountering files
       greater than or equal to 2 Gbyte ( 2^31 bytes).

EXAMPLES
       Example 1 Printing a list of utilities specified by files

       If file1, file2, and file3 each contain a sorted list of utilities, the command

	 example% comm -23 file1 file2	| comm -23 - file3

       prints a list of utilities in file1 not specified by either of the other files. The entry:

	 example% comm -12 file1 file2 | comm -12 - file3

       prints a list of utilities specified by all three files. And the entry:

	 example% comm -12  file2 file3 | comm -23 -file1

       prints a list of utilities specified by both file2 and file3, but not specified in file1.

ENVIRONMENT VARIABLES
       See environ(5) for descriptions of the following environment  variables	that  affect  the
       execution of comm: LANG, LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS
       The following exit values are returned:

       0     All input files were successfully output as specified.

       >0    An error occurred.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.11				    3 Mar 2004					  comm(1)


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