The chkconfig utility in /sbin provides a simple
command-line tool for maintaining the /etc/rc.d/init.d
directory hierarchy. It relieves system administrators from having to
directly manipulate the numerous symbolic links in the directories under /etc/rc.d.
In addition, there is the ntsysv utility in /usr/sbin that
provides a screen-oriented interface, which you may find easier to use
than chkconfig's command-line interface. Both of these
utilities should be run as root.
Please see the
chkconfig and ntsysv man pages
for more information.