Shell Programming and Scripting

rootpath="/somefolder"   # you can update here, if the backup folder are not under /
cd $rootpath 
ls -l|grep back_ |awk '/^d/ {print $NF}' |while read dir
 do
   cd ${rootpath}/${dir}
  ls -l |awk '/^d/ {print $NF}' |while read subdir
 do
 tar cvf - ${subdir} |gzip > ${subdir}_${dir#*_}.tar.gz # or replace by below command, if you have gtar 
# gtar zcvf ${subdir}_${dir#*_}.tar.gz ${subdir}
 done
 cd $rootpath
 done

cd $rootpath

ls -l|grep back_ |awk '/^d/ {print $NF}'  |while read dir
do
  cd ${rootpath}/${dir}
  ls -l |awk '/^d/ {print $NF}' |while read subdir
  do
     tar cvf - ${subdir} |gzip > ${subdir}_${dir#*_}.tar.gz   # or replace by below command, if you have gtar
#   gtar zcvf ${subdir}_${dir#*_}.tar.gz ${subdir}
     rm -rf $subdir
  done
  cd $rootpath
done
rename back_ back. back_*