/lib/systemd/system/ is in plymouth 0.9.2-3ubuntu13.
This file is owned by root:root, with mode 0o755.
..
/lib/systemd/system/halt.target.wants/
/lib/systemd/system/halt.target.wants/plymouth-halt.service
/lib/systemd/system/initrd-switch-root.target.wants/
/lib/systemd/system/initrd-switch-root.target.wants/plymouth-start.service
/lib/systemd/system/initrd-switch-root.target.wants/plymouth-switch-root.service
/lib/systemd/system/kexec.target.wants/
/lib/systemd/system/kexec.target.wants/plymouth-kexec.service
/lib/systemd/system/multi-user.target.wants/
/lib/systemd/system/multi-user.target.wants/plymouth-quit-wait.service
/lib/systemd/system/multi-user.target.wants/plymouth-quit.service
/lib/systemd/system/plymouth-halt.service
/lib/systemd/system/plymouth-kexec.service
/lib/systemd/system/plymouth-log.service
/lib/systemd/system/plymouth-poweroff.service
/lib/systemd/system/plymouth-quit-wait.service
/lib/systemd/system/plymouth-quit.service
/lib/systemd/system/plymouth-read-write.service
/lib/systemd/system/plymouth-reboot.service
/lib/systemd/system/plymouth-start.service
/lib/systemd/system/plymouth-switch-root.service
/lib/systemd/system/plymouth.service
/lib/systemd/system/poweroff.target.wants/
/lib/systemd/system/poweroff.target.wants/plymouth-poweroff.service
/lib/systemd/system/reboot.target.wants/
/lib/systemd/system/reboot.target.wants/plymouth-reboot.service
/lib/systemd/system/sysinit.target.wants/
/lib/systemd/system/sysinit.target.wants/plymouth-read-write.service
/lib/systemd/system/sysinit.target.wants/plymouth-start.service
/lib/systemd/system/systemd-ask-password-plymouth.path
/lib/systemd/system/systemd-ask-password-plymouth.service