/usr/lib/x86_64-linux-gnu/libgmsh.so.2 is in libgmsh2v5 2.15.0+dfsg1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgmsh.so.2.15.0
/usr/lib/x86_64-linux-gnu/libgmsh.so.2.15.0