deb-systemd-invoke - wrapper around systemctl, respecting policy-rc.d
deb-systemd-invoke [--user] start|stop|restart unit file ...
deb-systemd-invoke is a Debian-specific helper script which asks /usr/sbin/policy-rc.d before performing a systemctl call.
deb-systemd-invoke is intended to be used from maintscripts to start systemd unit files. It is specifically NOT intended to be used interactively by users. Instead, users should run systemd and use systemctl, or not bother about the systemd enabled state in case they are not running systemd.