/usr/lib/x86_64-linux-gnu/libpcl_octree.so.1.7 is in libpcl-octree1.7 1.7.2-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpcl_octree.so.1.7.2
/usr/lib/x86_64-linux-gnu/libpcl_octree.so.1.7.2