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CHKCONFIG(8) CHKCONFIG(8)
NAME
chkconfig - updates and queries runlevel information for system services
SYNOPSIS
chkconfig --list [name]
chkconfig --add name
chkconfig --del name
chkconfig [--level levels] name <on|off|reset>
chkconfig [--level levels] 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 configuration information out-
side 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 management, removing
services from management, listing the current startup information for services,
changing the startup information for services, and checking the startup state of a
particular service.
When chkconfig is run without any options, it displays usage information. If only
a service name is given, 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 alterna-
tive runlevel rather than the current one.
If one of on, off, or reset is specified after the service name, chkconfig changes
the startup information for the specified 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 startup information for the service to whatever is speci-
fied in the init script in question.
By default, the on and off options affect only runlevels 2, 3, 4, and 5, while
reset 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 ser-
vice, and will not re-stop a service that is not running.
chkconfig also can manage xinetd scripts via the means of xinetd.d configuration
files. Note that only the on, off, and --list commands are supported for xinetd.d
services.
OPTIONS
--level levels
Specifies the run levels an operation should pertain to. It is given as a
string of numbers from 0 to 7. 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, chk-
config creates the appropriate entry as specified by the default values in
the init script. Note that default entries in LSB-delimited ’INIT INFO’ sec-
tions take precedence over the default runlevels in the initscript.
--del name
The service is removed from chkconfig management, and any symbolic links in
/etc/rc[0-6].d which pertain to it are removed.
Note that future package installs for this service may run chkconfig --add,
which will re-add such links. To disable a service, run chkconfig name off.
--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 chkconfig 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 descrip-
tion 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.
SEE ALSO
init(8) ntsysv(8) system-config-services(8)
AUTHOR
Erik Troan <ewt AT redhat.com>
4th Berkeley Distribution Wed Oct 8 1997 CHKCONFIG(8)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-08-21 13:57 @38.103.63.61 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)