05-24-2010
First sort the files and then run a comm command
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See my other post on sdiff ....
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Hi
I have issue with "comm " command
file-1
----
l65059
l65407
l68607
l68810
l69143
l71310
l72918
l73146
l73273
l76411
file-2
----- (8 Replies)
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tmpcut1 -- First file
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Hello , I am trying to get contents which are only present in a.csv ,so using comm -23
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cat b.csv | sort > b.csv
comm -23 a.csv b.csv > c.csv.
a.csv
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The manual does not cover this very well. What do the following compares will do ?
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2) comm -23 file1 file2: will it display what in 1 but not in 2 ?
Thanks (5 Replies)
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COMM(1) User Commands COMM(1)
NAME
comm - compare two sorted files line by line
SYNOPSIS
comm [OPTION]... FILE1 FILE2
DESCRIPTION
Compare sorted files FILE1 and FILE2 line by line.
With no options, produce 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.
-1 suppress column 1 (lines unique to FILE1)
-2 suppress column 2 (lines unique to FILE2)
-3 suppress column 3 (lines that appear in both files)
--check-order
check that the input is correctly sorted, even if all input lines are pairable
--nocheck-order
do not check that the input is correctly sorted
--output-delimiter=STR
separate columns with STR
--help display this help and exit
--version
output version information and exit
Note, comparisons honor the rules specified by `LC_COLLATE'.
EXAMPLES
comm -12 file1 file2
Print only lines present in both file1 and file2.
comm -3 file1 file2
Print lines in file1 not in file2, and vice versa.
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
REPORTING BUGS
Report comm bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report comm translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
join(1), uniq(1)
The full documentation for comm is maintained as a Texinfo manual. If the info and comm programs are properly installed at your site, the
command
info coreutils 'comm invocation'
should give you access to the complete manual.
GNU coreutils 8.12.197-032bb September 2011 COMM(1)