init
System V Init directories/etc/init.d/ /etc/rc?.d/
chkconfig
centos & red hat use chkconfigi.e. stop SMARTD running
# chkconfig smartd off
update-rc.d
debian & ubuntu use update-rc.di.e. stop gdm X windows login manager running
# update-rc.d -f gdm remove
REFERRERS
SystemServices
