[Oracle DataBase Server 12.2 Installation on Oracle Linux 7.4]: 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