NAME

       telinit - change system runlevel

SYNOPSIS

       telinit [OPTION]...  RUNLEVEL

DESCRIPTION

       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.

   Other commands
       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-configuration
              command.

       U or u to  request  that  the  init(8)  daemon  re-execute  itself.  This is necessary when upgrading the
              Upstart init(8) daemon itself or any of its dependent system libraries  to  ensure  disks  can  be
              unmounted cleanly on shutdown.

              Note  that  if  the  init  daemon  is  not Upstart, this option will have no effect on the running
              init(8) daemon.

OPTIONS

       -e KEY=VALUE
              This specifies an additional environment variable to be included in the event along with  RUNLEVEL
              and PREVLEVEL.

ENVIRONMENT

       RUNLEVEL
              telinit  will  read  the  current  runlevel from this environment variable if set in preference to
              reading from /var/run/utmp

FILES

       /var/run/utmp
              Where the current runlevel will be read from;  this  file  will  also  be  updated  with  the  new
              runlevel.

       /var/log/wtmp
              A new runlevel record will be appended to this file for the new runlevel.

NOTES

       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.

AUTHOR

       Written by Scott James Remnant <scott@netsplit.com>

REPORTING BUGS

       Report bugs at <https://launchpad.net/upstart/+bugs>

COPYRIGHT

       Copyright © 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 PURPOSE.

SEE ALSO

       runlevel(7) init(8) initctl(8) shutdown(8) runlevel(8)