05-09-2015
Quote:
Originally Posted by
jamie_123
Hi,
Thank you for the response. I am a bit confused on the intended usage. Does file2 mean another file which stores the unsorted entries? If I run it on the base file, the entries are not sorted at all.
Thanks.
You didn't give us the name of your input file. So the filename used in responses to your request for help (
file,
file2,
your_input_file, or
RanDomStrIng) shouldn't matter. We assume that you know enough about shell scripting to be able to change the input file used in the sample solutions provided to be the name of your input file.
The suggestions RudiC and I provided do not modify your input file. The output sorted as you requested appears on standard output. You can pipe that output to another script or redirect that output to any other file that you want. Just do not redirect the output to your input file (or you will end up with an empty input file).
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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.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report comm translation bugs to <http://translationproject.org/team/>
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
COPYRIGHT
Copyright (C) 2013 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 8.22 June 2014 COMM(1)