/usr/lib/x86_64-linux-gnu/liblttng-ctl.so is in liblttng-ctl-dev 2.4.0-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liblttng-ctl.so.0.0.0
/usr/lib/x86_64-linux-gnu/liblttng-ctl.so.0.0.0