[OS] Moving files all day long...

#!/bin/bash
if [ $# -ne 3 ]
then
    echo "USAGE: `basename $0` src dst some_file.txt"
    exit 1
fi
if [ ! -d $1 ]
then
    echo "Imenikot prosleden kako argument ne postoi"
    exit 1
fi
if [ -d $2 ]
then
    rm $2
fi
mkdir $2
if [ -f $3 ]
then
    rm $3
fi
touch $3
#get all files from source folder
FILES=`ls -R $1 | grep ^- | awk 'print $10'`
for file in $FILES
do
    #change their name
    file_name=`echo $file | sed -e "s/\..*$//" -e "s/\'/'/_/"`
    file_extension=`echo $file | awk -F. 'print $NF'`
    sodrzina_file=`cat $file`
    #get sodrzina from the file we wanna move
    FILES2=`ls -R $2 | grep ^- | awk 'print $10'`
    #get all the moved files
    for file2 in $FILES2
    do
        sodrzina_file2=`cat $file2`
        #check if the file we are about to move happens to have same sodrzina with some of the moved
        if [ "$sodrzina_file" == "$sodrzina_file2" ]
        then
            echo "Fajlovite ${1}${file} i ${2}${file2} imaat ista sodrzina" >> $3
        fi
    done
    #move and rename
    mv ${1}${file} ${2}${file}
    mv ${2}${file} ${2}${file_name}.${file_extension}
done
#output
cat $3