use File::Find;

find(\&wanted, 'dir1', 'dir2'...);
sub wanted { ... }

use File::Find;
finddepth(\&wanted, 'dir1', 'dir2'...);  # traverse depth-first
sub wanted { ... }
*****
sub wanted {
    print "$File::Find::name\n" if -x;
}
*****
find2perl / -name .nfs\* -mtime +7 \
             -exec rm -f {} \; -o -fstype nfs -prune
*****
sub wanted {
    /^\.nfs.*$/ &&
    (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) &&
    int(-M _) > 7 &&
    unlink($_)
    ||
    ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) &&
    $dev < 0 &&
    ($File::Find::prune = 1);
}
*****
sub wanted {
    -l and not -e and print "bogus link: $File::Find::name\n";
}