/usr/lib/ is in libanet0.3.1-dev 0.3.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libanet.a
/usr/lib/ada/
/usr/lib/ada/adalib/
/usr/lib/ada/adalib/anet/
/usr/lib/ada/adalib/anet/anet-socket_families.ali
/usr/lib/ada/adalib/anet/anet-types.ali
/usr/lib/ada/adalib/anet/anet-receivers-stream.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-netdev-requests.ali
/usr/lib/ada/adalib/anet/anet.ali
/usr/lib/ada/adalib/anet/anet-receivers-datagram.ali
/usr/lib/ada/adalib/anet/anet-os_constants.ali
/usr/lib/ada/adalib/anet/anet-byte_swapping.ali
/usr/lib/ada/adalib/anet/anet-sockets-packet.ali
/usr/lib/ada/adalib/anet/anet-thin.ali
/usr/lib/ada/adalib/anet/anet-os.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-inet.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-netdev.ali
/usr/lib/ada/adalib/anet/anet-ipv4.ali
/usr/lib/ada/adalib/anet/anet-sockets-netlink.ali
/usr/lib/ada/adalib/anet/anet-sockets-inet-iface.ali
/usr/lib/ada/adalib/anet/anet-sockets-filters.ali
/usr/lib/ada/adalib/anet/anet-sockets-unix.ali
/usr/lib/ada/adalib/anet/anet-receivers.ali
/usr/lib/ada/adalib/anet/anet-streams.ali
/usr/lib/ada/adalib/anet/anet-constants.ali
/usr/lib/ada/adalib/anet/anet-util.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-netlink.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin.ali
/usr/lib/ada/adalib/anet/anet-udp.ali
/usr/lib/ada/adalib/anet/anet-sockets-inet.ali
/usr/lib/ada/adalib/anet/anet-sockets.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-packet.ali
/usr/lib/ada/adalib/anet/anet-net_ifaces.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-sockaddr.ali
/usr/lib/ada/adalib/anet/anet-sockets-thin-unix.ali
/usr/lib/libanet.so