/usr/lib/util-vserver/distributions/f8/initpre is in util-vserver 0.30.216-pre2864-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/util-vserver/distributions/f8/../redhat/initpre
/usr/lib/util-vserver/distributions/f8/../redhat/initpre