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  pro-
       cesses 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  vari-
       able.

       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 configura-
              tion 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 <scottATnetsplit.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 FIT-
       NESS FOR A PARTICULAR PURPOSE.

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



Upstart                                                    2009-07-09                                                 telinit(8)