[Oracle RAC 11.2 Installation on Oracle Linux 5.8 x86_64]: Preliminary settings

The following commands are executed on all virtual machines

Some comments on the following 2 commands - the first creates a backup of /etc/selinux/config, and the second changes the SELINUX parameter value from enforcing to disabled

# cp /etc/selinux/config /etc/selinux/config.bkp
# sed -i.gres "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

The following 2 commands - the first creates a backup of the file, changes the timeout value from 5 to 0

# cp /etc/grub.conf /etc/grub.conf.bkp
# sed -i.gres "s/timeout=5/timeout=0/g" /etc/grub.conf

Disabling firewall

# service iptables stop

Prevent firewall from starting at OS boot

# chkconfig iptables off