Shell Programming and Scripting

#!/usr/bin/env bash

# @(#) s2	Demonstrate combine from Linux package moreutils.

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1) combine
set -o nounset
echo

FILE1=data3
FILE2=data4

echo
echo " Data file $FILE1, $(wc -l <$FILE1) lines:"
cat $FILE1

echo
echo " Data file $FILE2, $(wc -l <$FILE2) lines:"
cat $FILE2

echo
echo " Results not in $FILE2:"
combine $FILE1 not $FILE2

echo
echo " Results not in $FILE1:"
combine $FILE2 not $FILE1

exit 0

% ./s2

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
combine - ( /usr/bin/combine Jun 28 2008 )


 Data file data3, 10 lines:
pink
orange
red
yellow
green
blue
indigo
violet
black
mauve

 Data file data4, 7 lines:
silver
red
orange
yellow
green
blue
violet

 Results not in data4:
pink
indigo
black
mauve

 Results not in data3:
silver

$ 
$ cat file1
abc 123 def
ace 246 gik
xyz 357 vnc
pqr 789 stu
$ 
$ cat file2
jgm 342 tpm
ace 246 gik
abc 321 def
xyz 357 vnc
$ 
$