www.ubuntu.com
System V style init script links can be found in /etc/rcN.d/NNname whose target is the script /etc/init.d/name.
These links are run by init when it changes runlevels
# chkconfig smartd off
# chkconfig irqbalance off
# chkconfig microcode_ctl off
# chkconfig cpuspeed off
Ed/X/Ubuntu 8+
# update-rc.d -f gdm remove
REFERRERS
InitScript
InstallCentos