The Services Configuration Tool is a
graphical application developed by Red Hat to configure which SysV
services in the /etc/rc.d/init.d
directory are started at boot time (for runlevels 3, 4, and 5) and
which xinetd services are enabled. It also
allows you to start, stop, and restart SysV services as well as
restart xinetd.
To start the Services Configuration
Tool from the desktop, go to the (on the Panel) => => =>
or type the command system-config-services at a shell prompt (for
example, in an XTerm or a GNOME terminal).
The Services Configuration Tool
displays the current runlevel as well as the runlevel you are
currently editing. To edit a different runlevel, select from the pulldown menu and select
runlevel 3, 4, or 5. Refer to Section 20.1
Runlevels for a description of runlevels.
The Services Configuration Tool lists
the services from the /etc/rc.d/init.d
directory as well as the services controlled by xinetd. Click on the name of the service from the
list on the left-hand side of the application to display a brief
description of that service as well as the status of the service.
If the service is not an xinetd service,
the status window shows whether the service is currently running.
If the service is controlled by xinetd,
the status window displays the phrase xinetd
service.
To start, stop, or restart a service immediately, select the
service from the list and click the appropriate button on the
toolbar (or choose the action from the pulldown menu). If the service is an
xinetd service, the action buttons are
disabled because they can not be started or stopped
individually.
If you enable/disable an xinetd service
by checking or unchecking the checkbox next to the service name,
you must select => from the pulldown menu to restart
xinetd and immediately enable/disable the
xinetd service that you changed.
xinetd is also configured to remember the
setting. You can enable/disable multiple xinetd services at a time and save the changes when
you are finished.
For example, assume you check rsync to
enable it in runlevel 3 and then save the changes. The rsync service is immediately enabled. The next time
xinetd is started, rsync is still enabled.
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Warning |
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When you save changes to xinetd
services, xinetd is restarted, and the
changes take place immediately. When you save changes to other
services, the runlevel is reconfigured, but the changes do not take
effect immediately.
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To enable a non-xinetd service to start
at boot time for the currently selected runlevel, check the
checkbox beside the name of the service in the list. After
configuring the runlevel, apply the changes by selecting =>
from the pulldown menu. The runlevel configuration is changed, but
the runlevel is not restarted; thus, the changes do not take place
immediately.
For example, assume you are configuring runlevel 3. If you
change the value for the httpd service
from checked to unchecked and then select , the runlevel 3 configuration
changes so that httpd is not started at
boot time. However, runlevel 3 is not reinitialized, so httpd is still running. Select one of following
options at this point:
-
Stop the httpd service — Stop the
service by selecting it from the list and clicking the Stop button. A message appears stating that the
service was stopped successfully.
-
Reinitialize the runlevel — Reinitialize the runlevel by
going to a shell prompt and typing the command telinit 3 (where 3 is the runlevel number). This
option is recommended if you change the Start
at Boot value of multiple services and want to activate the
changes immediately.
-
Do nothing else — You do not have to stop the httpd service. You can wait until the system is
rebooted for the service to stop. The next time the system is
booted, the runlevel is initialized without the httpd service running.
To add a service to a runlevel, select the runlevel from the
pulldown menu, and then select
=> . To delete a service from a runlevel, select the
runlevel from the pulldown
menu, select the service to be deleted from the list on the left,
and select => .
