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File: coreutils.info, Node: comm invocation, Next: ptx invocation, Prev: uniq invocation, Up: Operating on sorted files
7.3 `comm': Compare two sorted files line by line
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`comm' writes to standard output lines that are common, and lines that
are unique, to two input files; a file name of `-' means standard
input. Synopsis:
comm [OPTION]... FILE1 FILE2
Before `comm' can be used, the input files must be sorted using the
collating sequence specified by the `LC_COLLATE' locale. If an input
file ends in a non-newline character, a newline is silently appended.
The `sort' command with no options always outputs a file that is
suitable input to `comm'.
With no options, `comm' produces three-column output. Column one
contains lines unique to FILE1, column two contains lines unique to
FILE2, and column three contains lines common to both files. Columns
are separated by a single TAB character.
The options `-1', `-2', and `-3' suppress printing of the
corresponding columns. Also see *Note Common options::.
Unlike some other comparison utilities, `comm' has an exit status
that does not depend on the result of the comparison. Upon normal
completion `comm' produces an exit code of zero. If there is an error
it exits with nonzero status.
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-08-28 11:49 @38.103.63.61 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)