Controlling Access using ntsysv
ntsysv is a text-based application that allows you to configure which services are started at boot time for each runlevel. Non-xinetd services can not be started, stopped, or restarted using this program.
Controlling Access using chkconfig
chkconfig is a command line utility that allows you to turn services on and off for the different runlevels. Non-xinetd services can not be started, stopped, or restarted using this utility.
[excerpt from Red Hat Enterprise Linux Deployment Guide]