~# find /data/xyz -print0 | xargs -0 -I {} stat -c '%Y %n' '{}' | sort -k2 >before.txt

~# find /data/xyz -print0 | xargs -0 -I {} stat -c '%Y %n' '{}' | sort -k2 >after.txt

~$ diff before.txt after.txt

~# find /data/xyz -type f -print0 | xargs -0 -I {} md5sum '{}' >checksums

~# md5sum -c --quiet checksums

~# inotifyd - /data/xyz