/usr/lib/x86_64-linux-gnu/libpnetcdf.so is in libpnetcdf-dev 1.9.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpnetcdf.so.0d
/usr/lib/x86_64-linux-gnu/libpnetcdf.so.0d