/usr/ is in postgresql-pltcl-9.3 9.3.24-0ubuntu0.14.04.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/postgresql/
/usr/lib/postgresql/9.3/
/usr/lib/postgresql/9.3/lib/
/usr/lib/postgresql/9.3/lib/pltcl.so
/usr/lib/postgresql/9.3/bin/
/usr/lib/postgresql/9.3/bin/pltcl_delmod
/usr/lib/postgresql/9.3/bin/pltcl_loadmod
/usr/lib/postgresql/9.3/bin/pltcl_listmod
/usr/share/
/usr/share/doc/
/usr/share/doc/postgresql-pltcl-9.3/
/usr/share/doc/postgresql-pltcl-9.3/copyright
/usr/share/postgresql/
/usr/share/postgresql/9.3/
/usr/share/postgresql/9.3/unknown.pltcl
/usr/share/postgresql/9.3/extension/
/usr/share/postgresql/9.3/extension/pltclu--unpackaged--1.0.sql
/usr/share/postgresql/9.3/extension/pltcl.control
/usr/share/postgresql/9.3/extension/pltcl--1.0.sql
/usr/share/postgresql/9.3/extension/pltcl--unpackaged--1.0.sql
/usr/share/postgresql/9.3/extension/pltclu.control
/usr/share/postgresql/9.3/extension/pltclu--1.0.sql
/usr/share/doc/postgresql-pltcl-9.3/changelog.Debian.gz