/usr/lib/x86_64-linux-gnu/libBasicUsageEnvironment.so.1 is in libbasicusageenvironment1 2016.02.09-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libBasicUsageEnvironment.so.1.0.0