The chkconfig utility is a command-line tool for Redhat/Redhat-based distribution that allows you to specify in which runlevel to start a selected service, as well as to list all available services along with their current setting.
List all services
To display a list of services from the /etc/rc.d/init.d/ directory and services controlled by xinetd type either chkconfig --list or chkconfig with no additional arguments.
Enabling or disabling a given service
# chkconfig <service_name> <on|off>For example, to enable postfix :
# chkconfig postfix onBy default chkconfig use headers from the init script to determine for which runlevel the script should be enabled/disabled.
You can override this behavior with the --level options. For instance, to enable the abrtd service in runlevels 3 and 5:
# chkconfig abrtd on --level 35Do not use the --level option for service managed by xinetd.
Add a ‘custom’ service
You must add a custom line for chkconfig into your init script. For example:
# chkconfig: 2345 90 60The first argument list runlevel to start the service for. The second argument is the startup priority and the third the stop priority.
After that, add the init script :
chkconfig --add <my_script> chkconfig<my_script> on