explainshell.com - find.1posix %3Cdirectory%3E -depth -type f -exec shred -v -n3 -z -u %7B%7D %5C%3B

%3Cdirectory%3E -depth -type f -exec shred -v -n3 -z -u %7B%7D %5C%3B

find files

source manpages: find