/usr/ is in bootcd-mkinitramfs 3.27.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/bootcd/
/usr/share/bootcd/bootcdmodprobe
/usr/share/bootcd/bootcdproberoot
/usr/share/initramfs-tools/
/usr/share/initramfs-tools/hooks/
/usr/share/initramfs-tools/hooks/bootcdinitramfshook
/usr/share/initramfs-tools/scripts/
/usr/share/initramfs-tools/scripts/init-top/
/usr/share/initramfs-tools/scripts/init-top/runbootcdmodprobe
/usr/share/initramfs-tools/scripts/init-premount/
/usr/share/initramfs-tools/scripts/init-premount/runbootcdproberoot
/usr/share/doc/
/usr/share/doc/bootcd-mkinitramfs/
/usr/share/doc/bootcd-mkinitramfs/copyright
/usr/share/doc/bootcd-mkinitramfs/changelog.gz