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Linux 2.6 - man page for telinit (linux section 8)

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 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.

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 (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 PURPOSE.

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

Upstart 				    2009-07-09				       telinit(8)


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