change group
nohup sh -c “find /any/path/that/need/to/change/* -group mygroup -exec chgrp www-data {} \;” > /dev/null 2>&1 &
traditional way
nohup sh -c “chgrp -R www-data /any/path/that/need/to/change” > /dev/null 2>&1 &
change mode
nohup sh -c “find /any/path/that/need/to/change/* -perm u=rw,g=r,o=r -execdir chmod g+w {} \;” > /dev/null 2>&1 &
traditional way
nohup sh -c “chmod -R g+w /any/path/that/need/to/change” > /dev/null 2>&1 &