linux - How to append string in the contents of files on the basis of search -

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so far have tried below unix script append contents of files on basis of search. fine. if run same below script multiple times perl command keep on appending in files.

searcharr=(test1 test2 test3)  replacearr=(somestring1 somestring2 somestring3)   a=`echo ${#searcharr[@]}` echo $a ((i=0;i<$a;i++)) searchvalue=`echo ${searcharr[i]}` replacevalue=`echo ${replacearr[i]}` file in `find . -name \* -print`;   grep "$searchvalue" $file &> /dev/null   if [ $? -ne 0 ];     echo "search string not found in $file!"   else    perl -p -i -e "s/$searchvalue/$replacevalue/g" $file     echo $file "replace string success!"   fi   done done

current output:-

if run more 1 times keep on appending that. example if run 2 times append 2 times 

somestring1somestring1test1 somestring2somestring2test2 somestring3somestring3test3

needed output:- no matter how many times runs

somestring1test1 somestring2test2 somestring3test3

add word boundaries sed search pattern.

beginning , end of words in sed , grep


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