[Oracle DataBase Server 12.1 Installation on Oracle Linux 6.7]: Setting OS Parameters Before Starting

Some comments on the following command. I create a backup of the /etc/selinux/config file, and change the SELINUX parameter value from enforcing to disabled

# sed -i.bkp.$(date +%Y-%m-%d) -e "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

Next, I make a backup and change the timeout value from 5 to 0, so that the operating system does not wait an extra 5 seconds at startup.

# sed -i.bkp.$(date +%Y-%m-%d) -e "s/timeout=5/timeout=0/g" /boot/grub/grub.conf

Turn off firewall

# service iptables stop

Prevent firewall from starting at OS boot

# chkconfig iptables off