Set service to auto start on Red Hat EL

To set a service to automatically start at boot time on Red Hat Enterprise Linux (or CentOS) use the following command:

/sbin/chkconfig --level <level> <service> on
<level> is the runlevel, use 3 as it's the 'Full multi-user text mode' runlevel on Red Hat EL/CentOS.
<service> is the name of service, i.e. the script in /etc/init.d/

Or you can use the ncurses-based /sbin/ntsysv utility.