/usr/ is in groonga-munin-plugins 6.0.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/munin/
/usr/share/munin/plugins/
/usr/share/doc/
/usr/share/doc/groonga-munin-plugins/
/usr/share/
/usr/share/doc/groonga-munin-plugins/copyright
/usr/share/groonga/
/usr/share/groonga/munin/
/usr/share/groonga/munin/plugins/
/usr/share/groonga/munin/plugins/groonga_throughput_
/usr/share/groonga/munin/plugins/groonga_n_records_
/usr/share/groonga/munin/plugins/groonga_disk_
/usr/share/groonga/munin/plugins/groonga_query_performance_
/usr/share/groonga/munin/plugins/groonga_cpu_load_
/usr/share/groonga/munin/plugins/groonga_status_
/usr/share/groonga/munin/plugins/groonga_cpu_time_
/usr/share/groonga/munin/plugins/groonga_memory_
/usr/share/munin/plugins/groonga_throughput_
/usr/share/munin/plugins/groonga_n_records_
/usr/share/munin/plugins/groonga_disk_
/usr/share/munin/plugins/groonga_query_performance_
/usr/share/munin/plugins/groonga_cpu_load_
/usr/share/munin/plugins/groonga_status_
/usr/share/munin/plugins/groonga_cpu_time_
/usr/share/munin/plugins/groonga_memory_
/usr/share/doc/groonga-munin-plugins/changelog.Debian.gz