CHKCONFIG(8)		    System Manager's Manual		  CHKCONFIG(8)



NAME
       chkconfig  -  updates  and queries runlevel information for system ser-
       vices


SYNOPSIS
       chkconfig [--list] [--type type][name]
       chkconfig --add name
       chkconfig --del name
       chkconfig --override name
       chkconfig [--level levels] [--type type] name <on|off|reset|resetprior-
       ities>
       chkconfig [--level levels] [--type type] name


DESCRIPTION
       chkconfig  provides  a  simple  command-line  tool  for maintaining the
       /etc/rc[0-6].d directory hierarchy by relieving	system	administrators
       of  the	task  of  directly manipulating the numerous symbolic links in
       those directories.

       This implementation of chkconfig was inspired by the chkconfig  command
       present	in the IRIX operating system. Rather than maintaining configu-
       ration information outside of the  /etc/rc[0-6].d  hierarchy,  however,
       this  version  directly	manages	 the  symlinks in /etc/rc[0-6].d. This
       leaves all of the configuration	information  regarding	what  services
       init starts in a single location.

       chkconfig  has five distinct functions: adding new services for manage-
       ment, removing services from management, listing	 the  current  startup
       information  for	 services,  changing  the startup information for ser-
       vices, and checking the startup state of a particular service.

       When chkconfig is run with only a service name, it checks to see if the
       service	is configured to be started in the current runlevel. If it is,
       chkconfig returns true; otherwise it returns false. The --level	option
       may be used to have chkconfig query an alternative runlevel rather than
       the current one.

       When chkconfig is run with the --list argument, or no arguments at all,
       a listing is displayed of all services and their current configuration.

       If  one	of  on,	 off, reset, or resetpriorities is specified after the
       service name, chkconfig changes the startup information for the	speci-
       fied  service.  The on and off flags cause the service to be started or
       stopped, respectively, in the runlevels being changed. The  reset  flag
       resets  the  on/off state for all runlevels for the service to whatever
       is specified in the init script in question, while the  resetpriorities
       flag  resets  the  start/stop priorities for the service to whatever is
       specifed in the init script.

       By default, the on and off options affect only runlevels 2, 3,  4,  and
       5,  while  reset and resetpriorities affects all of the runlevels.  The
       --level option may be used to specify which runlevels are affected.

       Note that for every service, each runlevel has either a start script or
       a  stop	script.	  When	switching runlevels, init will not re-start an
       already-started service, and will not re-stop a	service	 that  is  not
       running.

       chkconfig also can manage xinetd scripts via the means of xinetd.d con-
       figuration files. Note that only the on, off, and --list	 commands  are
       supported for xinetd.d services.

       chkconfig  supports  a  --type argument to limit actions to only a spe-
       cific type of services, in the case where services of either  type  may
       share a name. Possible values for type are sysv and xinetd.


OPTIONS
       --level levels
	      Specifies	 the  run levels an operation should pertain to. It is
	      given as a string of numbers from 0 to 6. For  example,  --level
	      35 specifies runlevels 3 and 5.


       --add name

	      This  option  adds  a  new  service for management by chkconfig.
	      When a new service is added, chkconfig ensures that the  service
	      has  either  a  start  or a kill entry in every runlevel. If any
	      runlevel is missing such an entry, chkconfig creates the	appro-
	      priate  entry  as	 specified  by	the default values in the init
	      script. Note that default entries in LSB-delimited  'INIT	 INFO'
	      sections	take  precedence  over	the  default  runlevels in the
	      initscript; if any Required-Start or Required-Stop  entries  are
	      present,	the  start  and	 stop priorities of the script will be
	      adjusted to account for these dependencies.


       --del name
	      The service is removed from chkconfig management, and  any  sym-
	      bolic links in /etc/rc[0-6].d which pertain to it are removed.

	      Note  that future package installs for this service may run chk-
	      config --add, which will re-add such links. To  disable  a  ser-
	      vice, run chkconfig name off.


       --override name
	      If  service  name	 is  configured	 exactly as it would be if the
	      --add option  had	 been  specified  with	no  override  file  in
	      /etc/chkconfig.d/name,  and  if /etc/chkconfig.d/name now exists
	      and is specified differently from the  base  initscript,	change
	      the  configuration  for  service	name  to  follow the overrides
	      instead of the base configuration.


       --list name
	      This option lists all of	the  services  which  chkconfig	 knows
	      about, and whether they are stopped or started in each runlevel.
	      If name is specified, information in only display about  service
	      name.


RUNLEVEL FILES
       Each  service which should be manageable by chkconfig needs two or more
       commented lines added to its init.d script. The first line  tells  chk-
       config  what  runlevels the service should be started in by default, as
       well as the start and stop priority levels. If the service should  not,
       by default, be started in any runlevels, a - should be used in place of
       the runlevels list.  The second line contains  a	 description  for  the
       service,	 and may be extended across multiple lines with backslash con-
       tinuation.

       For example, random.init has these three lines:
       # chkconfig: 2345 20 80
       # description: Saves and restores system entropy pool for \
       #	      higher quality random number generation.
       This says that the random script should be started in levels 2,	3,  4,
       and 5, that its start priority should be 20, and that its stop priority
       should be 80.  You should be able to figure out	what  the  description
       says;  the \ causes the line to be continued.  The extra space in front
       of the line is ignored.

       chkconfig also supports LSB-style init stanzas, and will apply them  in
       preference  to  "chkconfig:" lines where available.  A LSB stanza looks
       like:
       ### BEGIN INIT INFO
       # Provides: foo
       # Required-Start: bar
       # Defalt-Start: 2 3 4 5
       # Default-Stop: 0 1 6
       # Description: Foo init script
       ### END INIT INFO

       In this case, the start priority of "foo" would be changed such that it
       is  higher  than	 the  "bar" start priority, if "bar" is enabled.  Care
       must be taken when adding dependencies, as they can cause  vast	shifts
       in the start and stop priorities of many scripts.


OVERRIDE FILES
       File in /etc/chkconfig.d/servicename are parsed using the same comments
       that chkconfig notices in init service scripts, and override values  in
       the init service scripts themselves.


SEE ALSO
       init(8) ntsysv(8) system-config-services(8)


AUTHOR
       Erik Troan <ewt@redhat.com>



4th Berkeley Distribution	Wed Oct 8 1997			  CHKCONFIG(8)