/usr/ is in libblockdev-dev 2.16-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/include/
/usr/include/blockdev/
/usr/include/blockdev/blockdev.h
/usr/include/blockdev/plugins.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/blockdev.pc
/usr/share/doc/
/usr/share/doc/libblockdev-dev/
/usr/share/doc/libblockdev-dev/copyright
/usr/share/gir-1.0/
/usr/share/gir-1.0/BlockDev-2.0.gir
/usr/share/gtk-doc/
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libblockdev/
/usr/share/gtk-doc/html/libblockdev/annotation-glossary.html
/usr/share/gtk-doc/html/libblockdev/api-index-full.html
/usr/share/gtk-doc/html/libblockdev/ch01.html
/usr/share/gtk-doc/html/libblockdev/ch02.html
/usr/share/gtk-doc/html/libblockdev/ch03.html
/usr/share/gtk-doc/html/libblockdev/deprecated-api-index.html
/usr/share/gtk-doc/html/libblockdev/home.png
/usr/share/gtk-doc/html/libblockdev/index.html
/usr/share/gtk-doc/html/libblockdev/left-insensitive.png
/usr/share/gtk-doc/html/libblockdev/left.png
/usr/share/gtk-doc/html/libblockdev/right-insensitive.png
/usr/share/gtk-doc/html/libblockdev/libblockdev-BTRFS.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Crypto.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-DeviceMapper.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-FS.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-KernelBlockDevices.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-LVM.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Loop.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-MD-RAID.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Mpath.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Part.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Plugins.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Swap.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-Utils.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-blockdev-library.html
/usr/share/gtk-doc/html/libblockdev/libblockdev-s390.html
/usr/share/gtk-doc/html/libblockdev/libblockdev.devhelp2
/usr/share/gtk-doc/html/libblockdev/right.png
/usr/share/gtk-doc/html/libblockdev/style.css
/usr/share/gtk-doc/html/libblockdev/up-insensitive.png
/usr/share/gtk-doc/html/libblockdev/up.png
/usr/lib/x86_64-linux-gnu/libblockdev.so
/usr/share/doc/libblockdev-dev/changelog.Debian.gz