/usr/lib/x86_64-linux-gnu/libaoss.so.0 is in alsa-oss 1.0.28-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libaoss.so.0.0.0
/usr/lib/x86_64-linux-gnu/libaoss.so.0.0.0