/usr/lib/x86_64-linux-gnu/libglpk.so.36 is in libglpk36 4.57-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libglpk.so.36.2.0
/usr/lib/x86_64-linux-gnu/libglpk.so.36.2.0