[Oracle RAC 12.1 SHARED FILE SYSTEM Installation]: Preliminary settings

Some comments on the following 2 commands - 1 creates a backup copy of the /etc/selinux/config file, and the second replaces 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 - 1 creates a backup copy 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

Turn off firewall

# service iptables stop

Prohibit firewall from starting at OS boot

# chkconfig iptables off