telinit — Change SysV runlevel
telinit [OPTIONS...]  {COMMAND} 
telinit may be used to change the SysV system runlevel. Since the concept of SysV runlevels is obsolete the runlevel requests will be transparently translated into systemd unit activation requests.
The following options are understood:
The following commands are understood:
Power-off the
                                machine. This is translated into an
                                activation request for
                                poweroff.target
                                and is equivalent to
                                systemctl
                                poweroff.
Reboot the
                                machine. This is translated into an
                                activation request for
                                reboot.target and
                                is equivalent to systemctl
                                reboot.
Change the SysV
                                runlevel. This is translated into an
                                activation request for
                                runlevel2.target,
                                runlevel3.target,
                                ... and is equivalent to
                                systemctl isolate
                                runlevel2.target,
                                systemctl isolate
                                runlevel3.target,
                                ...
Change into system
                                rescue mode. This is translated into
                                an activation request for
                                rescue.target and
                                is equivalent to systemctl
                                rescue.
Reload daemon configuration. This is equivalent to systemctl daemon-reload.
Serialize state, reexecute daemon and deserialize state again. This is equivalent to systemctl daemon-reexec.
This is a legacy command available for compatibility only. It should not be used anymore, as the concept of runlevels is obsolete.