systemd-notify
Notify the service manager about start-up completion and other daemon status changes. This command is useless outside systemd service scripts. More information: <https://www.freedesktop.org/software/systemd/man/systemd-notify.html>.
RUN apt-get update && \
apt-get install -y systemd
RUN apt-get update && \
apt-get install -y systemd
RUN pacman -S --noconfirm systemd
RUN apt-get update && \
apt-get install -y systemd
RUN yum install -y systemd
RUN dnf install -y systemd
RUN apt-get update && \
apt-get install -y systemd