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Recipe 7.7. Managing Red Hat's Runlevels
Unless you took the time to do a custom installation, Red Hat/Fedora typically starts all kinds of services when it boots. If you took the fast way, you probably have all sorts of services running that you'd like to shut off. Or you'd like to start different services on different runlevels, for testing and tinkering.
# chkconfig ólevel 2345 ssh on # chkconfig ólevel 016 ssh off
You need both stepsódefine which runlevels the service will run on, and define which runlevels it will not run on. "Off" means kill, and "on" means start.
To add a new service to all levels, use:
# chkconfig óadd ssh
To delete a service from all runlevels, use:
# chkconfig ódel ssh
# chkconfig ktalk on # chkconfig rsync off
xinetd services are either on or off; you don't have to worry about different runlevels.
To display the status of all services, on all runlevels, and xinetd services, use:
# chkconfig ólist anacron 0:off 1:off 2:on 3:on 4:on 5:on 6:off syslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off cups 0:off 1:off 2:on 3:on 4:on 5:on 6:off apmd 0:off 1:off 2:on 3:on 4:on 5:on 6:off xinetd based services: chargen-udp off rsync: off sgi-fam: on
To query a single service, use:
# chkconfig ólist syslog syslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
chkconfig gets its default priority and runlevel values from the program's startup script. For example, in /etc/rc.d/init.d/cups:
# Linux chkconfig stuff # chkconfig 2345 90 10
This tells chkconfig to start in runlevels 2, 3, 4, and 5, with a priority of 90 for starting and 10 for stopping. Of course, you can easily change these to suit yourself, by either editing the original init.d script or simply renaming the links:
# mv /etc/rc.d/rc3.d/S90cups /etc/rc.d/rc3.d/S45cups
7.7.4 See Also
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