/usr/include/shark/Rng/ is in libshark-dev 3.0.1+ds1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/shark/Rng/AbstractDistribution.h
/usr/include/shark/Rng/Bernoulli.h
/usr/include/shark/Rng/Binomial.h
/usr/include/shark/Rng/Cauchy.h
/usr/include/shark/Rng/DiffGeometric.h
/usr/include/shark/Rng/Dirichlet.h
/usr/include/shark/Rng/DiscreteUniform.h
/usr/include/shark/Rng/Entropy.h
/usr/include/shark/Rng/Erlang.h
/usr/include/shark/Rng/Gamma.h
/usr/include/shark/Rng/Geometric.h
/usr/include/shark/Rng/GlobalRng.h
/usr/include/shark/Rng/HyperGeometric.h
/usr/include/shark/Rng/KullbackLeiberDivergence.h
/usr/include/shark/Rng/LogNormal.h
/usr/include/shark/Rng/NegExponential.h
/usr/include/shark/Rng/Normal.h
/usr/include/shark/Rng/Poisson.h
/usr/include/shark/Rng/Rng.h
/usr/include/shark/Rng/TruncatedExponential.h
/usr/include/shark/Rng/Uniform.h
/usr/include/shark/Rng/Weibull.h