# sessions directory and contents needs to be writeable by apache user during cron report generation with charts, so make raj member of www-data group: sudo usermod -a -G www-data raj # set group to apache user for sessions dir: sudo chgrp -R www-data ./sessions # set permissions so new files have apache user group (setgid): sudo chmod 2770 ./sessions # make cgisession.id writeable by apache user: chmod 660 ./sessions/cgisession.id