With this script, u can change permissions with a default value (files=644 & directories=755). Change the path to ur directory and start the script from ur console or cronjob

chmodmagick.sh

#!/bin/bash
#
#
## Der PATH muss angepasst werden
## Für die Webseite kann z.b. /home/[BENUTZERNAME]/public_html/
## Bsp: Path='/home/oliveror/public_html/'
Path='/home/[BENUTZERNAME]/[PFAD]/'
function setChmod {
ls -1 "$1" | while read file
do
  file="${1}/${file}"
  if  [[ -f "$file" ]] && [[ `stat -c %a "$file"` != 644 ]]
  then
  chmod -v 644 "$file"
  elif [[ -d "$file" ]]
  then
  chmod -v 755 "$file"
  setChmod "$file"
  fi
done
}

setChmod $Path
exit 0