Provided by: upstart_1.5-0ubuntu5_i386
telinit - change system runlevel
telinit [OPTION]... RUNLEVEL
telinit may be used to change the system runlevel.
The RUNLEVEL argument should be one of the multi-user runlevels 2-5, 0
to halt the system, 6 to reboot the system or 1 to bring the system
down into single-user mode.
Normally you would use the shutdown(8) tool to halt or reboot the
system, or to bring it down to single-user mode.
RUNLEVEL may also be S or s which will place the system directly into
single-user mode without actually stopping processes first, you
probably won't want that.
The runlevel is changed by emitting the runlevel(7) event, which
includes the new runlevel in the RUNLEVEL environment variable as well
as the previous runlevel (obtained from the environment or from
/var/run/utmp) in the PREVLEVEL variable.
telinit will write the new runlevel to /var/run/utmp and append a new
entry to /var/log/wtmp.
telinit may be also used to send basic commands to the init(8) daemon
for compatibility with System V. These are:
Q or q to request that init(8) reload its configuration. This is
rarely necessary since Upstart watches its configuration with
inotify(7) and is deprecated by the initctl(8) reload-
U or u to request that the init(8) daemon re-execute itself. This is
not recommended since Upstart is currently unable to preserve
its state, but is necessary when upgrading system libraries.
This specifies an additional environment variable to be included
in the event along with RUNLEVEL and PREVLEVEL.
telinit will read the current runlevel from this environment
variable if set in preference to reading from /var/run/utmp
Where the current runlevel will be read from; this file will
also be updated with the new runlevel.
A new runlevel record will be appended to this file for the new
The Upstart init(8) daemon does not keep track of runlevels itself,
instead they are implemented entirely by its userspace tools.
See runlevel(7) for more details.
Written by Scott James Remnant <firstname.lastname@example.org>
Report bugs at <https://launchpad.net/upstart/+bugs>
Copyright (C) 2009 Canonical Ltd.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
runlevel(7) init(8) initctl(8) shutdown(8) runlevel(8)