/usr/ is in libosmo-netif-dev 0.0.6-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libosmonetif.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmo-netif.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libosmo-netif-dev/
/usr/share/doc/libosmo-netif-dev/copyright
/usr/include/
/usr/include/osmocom/
/usr/include/osmocom/netif/
/usr/include/osmocom/netif/datagram.h
/usr/include/osmocom/netif/ipa_unit.h
/usr/include/osmocom/netif/stream.h
/usr/include/osmocom/netif/rtp.h
/usr/include/osmocom/netif/channel/
/usr/include/osmocom/netif/channel/abis_ipa_client.h
/usr/include/osmocom/netif/channel/abis_ipa_server.h
/usr/include/osmocom/netif/ipa.h
/usr/include/osmocom/netif/channel.h
/usr/include/osmocom/netif/osmux.h
/usr/include/osmocom/netif/amr.h
/usr/include/osmocom/netif/rs232.h
/usr/lib/x86_64-linux-gnu/libosmonetif.so
/usr/share/doc/libosmo-netif-dev/changelog.Debian.gz