Disable Services
Let’s disable some unnecessary services using http://www.imminentweb.com/technologies/centos-disable-unneeded-services-boot-time and http://www.securecentos.com/system-prep/ as guides:
chkconfig anacron off
chkconfig atd off
chkconfig autofs off
chkconfig avahi-daemon off
chkconfig cpuspeed off
chkconfig haldaemon off
chkconfig ip6tables off
chkconfig kudzu off
chkconfig mcstrans off
chkconfig messagebus off
chkconfig netfs off
chkconfig portmap off
chkconfig xfs off
chkconfig yum-updatesd off