4.6.1.1. Configuring services using a character user interface
If you're not running a graphical user interface, you can use
# ntsysv
This will configure the current runlevel. To configure a different runlevel, use the --level option:
# ntsysv --level
The display shown in Figure 4-7 will appear.
Figure 4-7. The ntsysv display
Use the arrow keys to select a service, the spacebar to check/uncheck a service, and Tab to switch between the service list and the buttons. When you are done, press Tab to advance to the OK button and then press Enter.
4.6.1.2. Configuring services from the command line
The chkconfig command provides an easy way to enable and disable services. The --list option displays the current service configuration:
$ chkconfig --list
NetworkManager 0:off 1:off 2:off 3:off 4:off 5:off 6:off
NetworkManagerDispatcher 0:off 1:off 2:off 3:off 4:off 5:off 6:off
acpid 0:off 1:off 2:off 3:on 4:on 5:on 6:off
amd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
anacron 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
arptables_jf 0:off 1:off 2:on 3:on 4:on 5:on 6:off
...(Lines snipped)...
If you specify a service name, then only the configuration for that service is shown:
$ chkconfig --list
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
Note that each of the seven runlevels is shown, even though the configurations for runlevels 0 and 6 are ignored except for K files (since 0 is halt and 6 is reboot).
To enable a service in a runlevel, use the --level option to specify the runlevel along with the on argument:
# chkconfig --level
# chkconfig --list
httpd 0:off 1:off 2:off 3:off 4:on 5:off 6:off
To disable it, use the off argument:
# chkconfig --level
# chkconfig --list
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
To reset a service to its default configuration, use the reset argument. The configuration will be reset for the runlevel you specify, or for all runlevels if you don't include a - -level option:
# chkconfig --level
# chkconfig
4.6.1.3. Managing services from the command line
The
start
Start the service. This will fail if the service is already running.
stop
Stop the service. This will fail if the service is not running.
restart
Restart the service by stopping it and then starting it.
reload
Reload the configuration files for the service after they have been edited.
status
Display the current status of the service. This will indicate if the service is stopped or running; depending on the service, additional information may be displayed.
For example, to start the web service (named
# service
Starting httpd: [ OK ]
You can then check its status:
# service
httpd (pid 13154 13153 13152 13151 13150 13149 13148 13147 13117) is running...
The pid values printed are the process IDs of the web server processes.
To make the web server reload its configuration file after it's been edited:
# service