/usr/lib/x86_64-linux-gnu/libelk-xlib.so.0 is in libelk0 3.99.8-4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libelk-xlib.so.0.0.0
/usr/lib/x86_64-linux-gnu/libelk-xlib.so.0.0.0