/usr/ is in libsdl2-net-dev 2.0.0+dfsg1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/SDL2_net.pc
/usr/lib/x86_64-linux-gnu/libSDL2_net.a
/usr/include/
/usr/include/SDL2/
/usr/include/SDL2/SDL_net.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libsdl2-net-dev/
/usr/share/doc/libsdl2-net-dev/copyright
/usr/share/doc/libsdl2-net-dev/examples/
/usr/share/doc/libsdl2-net-dev/examples/chat.h
/usr/share/doc/libsdl2-net-dev/examples/chat.cpp
/usr/share/doc/libsdl2-net-dev/examples/showinterfaces.c
/usr/share/doc/libsdl2-net-dev/examples/chatd.c
/usr/lib/x86_64-linux-gnu/libSDL2_net.so
/usr/lib/x86_64-linux-gnu/libSDL2_net-2.0.so
/usr/share/doc/libsdl2-net-dev/changelog.Debian.gz
/usr/share/doc/libsdl2-net-dev/README.txt