/usr/lib/x86_64-linux-gnu/libnetcdf_c++4.so.1 is in libnetcdf-c++4-1 4.2.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnetcdf_c++4.so.1.0.2
/usr/lib/x86_64-linux-gnu/libnetcdf_c++4.so.1.0.2