====== CENTOS Wiki ======

**Upgrade system:**

yum update

**Disable IPV6:**

Edit /etc/sysconfig/network and set "NETWORKING_IPV6" to "no"

Add the following to /etc/modprobe.conf : 
alias ipv6 off
alias net-pf-10 off

Run /sbin/chkconfig ip6tables off to disable the IPv6 firewall

Reboot the system 

**Configuration of services and network, firewall etc**

setup

**Stop unnecessary services **

chkconfig anacron off\
chkconfig firstboot off
chkconfig ip6tables off
# chkconfig kudzu off
chkconfig lvm2-monitor  
chkconfig acpid off
chkconfig apmd off
chkconfig atd off
chkconfig autofs off
chkconfig bluetooth off
chkconfig cpuspeed off
chkconfig cups off
chkconfig gpm off
chkconfig haldaemon off
chkconfig hidd off
chkconfig iptables off
chkconfig isdn off
chkconfig mdmonitor off
chkconfig messagebus off
chkconfig netfs off
chkconfig nfslock off
chkconfig openibd off
chkconfig pcmcia off
chkconfig pcscd off
chkconfig portmap off
chkconfig rawdevices off
chkconfig rpcgssd off
chkconfig rpcidmapd off
chkconfig smartd off
chkconfig sendmail off
chkconfig xinetd off
chkconfig yum-updatesd off 

Only services running:

auditd
crond
kudzu
mcstrans
microcode_ctl
network
readahead_early
restorecond
sshd
syslog

Check which services are running:

chkconfig --list |grep "3:on" |awk '{print $1}' |sort

** Restart Network **

/etc/init.d/network restart

**Install Virtualbox Guest additions**

First install necessary modules if not already done:

yum -y install gcc kernel sources kernel-devel

You need to reboot after install.

Then:

mount /dev/cdrom /mnt

cd /mnt

sh VBoxLinuxAdditions-x86.run