postgresql-9.5 9.5.14-0ubuntu0.16.04 / usr / lib / postgresql / 9.5 / bin / postmaster

/usr/lib/postgresql/9.5/bin/postmaster is in postgresql-9.5 9.5.14-0ubuntu0.16.04.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/postgresql/9.5/bin/postgres