/usr/ is in libndpi-dev 2.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/libndpi-2.2.0/
/usr/include/libndpi-2.2.0/libndpi/
/usr/include/libndpi-2.2.0/libndpi/libcache.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_api.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_define.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_includes.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_main.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_protocol_ids.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_protocols.h
/usr/include/libndpi-2.2.0/libndpi/ndpi_typedefs.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libndpi.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libndpi.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libndpi-dev/
/usr/share/doc/libndpi-dev/README.Debian
/usr/share/doc/libndpi-dev/copyright
/usr/share/doc/libndpi-dev/ndpiReader.c.gz
/usr/share/doc/libndpi-dev/protos.txt
/usr/lib/x86_64-linux-gnu/libndpi.so
/usr/share/doc/libndpi-dev/changelog.Debian.gz