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       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.

   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
              not  recommended  since  Upstart is currently unable to preserve
              its state, but is necessary when upgrading system libraries.


       -e KEY=VALUE
              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 <>


       Report bugs at <>


       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)