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telinit(8)                                                          telinit(8)



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  compati-
       bility 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 recom-
              mended since Upstart is currently unable to preserve its state, but is  nec-
              essary when upgrading system libraries.

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 AT netsplit.com>

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

COPYRIGHT
       Copyright (C) 2009 Canonical Ltd.
       This  is  free  software;  see the source for copying conditions.  There is NO war-
       ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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



Upstart                           2009-07-09                        telinit(8)

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