option 1
find /oramisc01/oracle/demo/adump -name "*aud" -type f -mtime +1 -exec rm {} \;
option 2
find /oramisc01/oracle/demo/adump -name "aud*" -type f -delete
option 3
find /oramisc01/oracle/demo/adump -name "aud*" -type f -mtime +1 |xargs rm -rf
option 4
mkdir empty_dir
rsync -a -delete empty_dir/ yourdirectory/
option 5
perl -e 'for(<*aud>){((stat)[9]<(unlink))}'