/usr/ is in nagios3-common 3.2.3-3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/nagios3/plugins/eventhandlers/redundancy-scenario1/
/usr/share/
/usr/share/nagios3/
/usr/share/nagios3/plugins/
/usr/share/nagios3/plugins/eventhandlers/
/usr/share/nagios3/plugins/eventhandlers/disable_active_service_checks
/usr/share/nagios3/plugins/eventhandlers/disable_notifications
/usr/share/nagios3/plugins/eventhandlers/distributed-monitoring/
/usr/share/nagios3/plugins/eventhandlers/distributed-monitoring/obsessive_svc_handler
/usr/share/nagios3/plugins/eventhandlers/distributed-monitoring/submit_check_result_via_nsca
/usr/share/nagios3/plugins/eventhandlers/enable_active_service_checks
/usr/share/nagios3/plugins/eventhandlers/enable_notifications
/usr/share/nagios3/plugins/eventhandlers/redundancy-scenario1/handle-master-host-event
/usr/share/nagios3/plugins/eventhandlers/redundancy-scenario1/handle-master-proc-event
/usr/share/nagios3/plugins/eventhandlers/submit_check_result
/usr/share/nagios3/debian/
/usr/share/doc/
/usr/share/doc/nagios3-common/
/usr/share/doc/nagios3-common/README
/usr/share/doc/nagios3-common/UPGRADING
/usr/share/doc/nagios3-common/README.Debian
/usr/share/doc/nagios3-common/TODO.Debian
/usr/share/doc/nagios3-common/copyright
/usr/share/doc/nagios3-common/NEWS.Debian.gz
/usr/share/doc/nagios3-common/examples/
/usr/share/doc/nagios3-common/examples/README
/usr/share/doc/nagios3-common/examples/nagios.cfg.gz
/usr/share/doc/nagios3-common/examples/localhost.cfg.gz
/usr/share/doc/nagios3-common/examples/resource.cfg
/usr/share/doc/nagios3-common/examples/template-object/
/usr/share/doc/nagios3-common/examples/template-object/README
/usr/share/doc/nagios3-common/examples/template-object/commands.cfg
/usr/share/doc/nagios3-common/examples/template-object/contacts.cfg
/usr/share/doc/nagios3-common/examples/template-object/templates.cfg.gz
/usr/share/doc/nagios3-common/examples/template-object/printer.cfg
/usr/share/doc/nagios3-common/examples/template-object/switch.cfg
/usr/share/doc/nagios3-common/examples/template-object/timeperiods.cfg
/usr/share/doc/nagios3-common/examples/template-object/windows.cfg
/usr/share/doc/nagios3-common/examples/template-object/localhost.cfg.gz
/usr/share/doc/nagios3-common/examples/commands.cfg
/usr/share/doc/nagios3-common/examples/apache2.conf
/usr/share/doc/nagios3-common/examples/apache2.nagios1.conf
/usr/share/doc/nagios3-common/examples/cgi.cfg.gz
/usr/share/doc/nagios3-common/examples/mrtg.cfg.gz
/usr/share/doc/nagios3-common/changelog.Debian.gz
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/nagios3-common
/usr/share/doc/nagios3-common/html