Installation guide

Chapter 8. Controlling Access to Services 95
Warning
Changes do not take effect immediately after using ntsysv. You must stop or start the individual
service with the command service daemon stop. In the previous example, replace daemon with
the name of the service you want to stop; for example, httpd. Replace stop with start or restart
to start or restart the service. If you want to start or stop a service which is managed by xinetd, use
the command service xinetd restart.
8.5. chkconfig
The chkconfig command can also be used to activate and deactivate services. If you use the
chkconfig --list command, you will see a list of system services and whether they are
started (on) or stopped (off) in runlevels 0-6 (at the end of the list, you will see a section for
the services managed by xinetd.
If you use chkconfig --list to query a service managed by xinetd, you will see whether
the xinetd service is enabled (on) or disabled (off). For example, the following command
shows that finger is enabled as an xinetd service:
$ chkconfig --list finger
finger on
As shown above, if xinetd is running, finger is enabled.
If you use chkconfig --list to query a service in /etc/rc.d, you will see the service’s
settings for each runlevel, like the following:
$ chkconfig --list anacron
anacron 0:off 1:off 2:on 3:on 4:on 5:on 6:off
More importantly, chkconfig can be used to set a service to be started (or not) in a specific
runlevel. For example, to turn nscd off in runlevels 3, 4, and 5, use the command:
chkconfig --level 345 nscd off
See the chkconfig man page for more information on how to use it.
Warning
Services managed by xinetd are immediately affected by chkconfig. For example, if xinetd is
running, finger is disabled, and the command chkconfig finger on is executed, finger is im-
mediately enabled without having to restart xinetd manually. Changes for other services do not
take effect immediately after using chkconfig. You must stop or start the individual service with the
command service daemon stop. In the previous example, replace daemon with the name of the
service you want to stop; for example, httpd. Replace stop with start or restart to start or restart
the service.
8.6. Additional Resources
For more information on xinetd, refer to the following resources.