How to disable SELINUX in RHEL/CentOS/OEL

Below steps covers completely disabling SELINUX on a RHEL or RHEL based OS.

Configure SELINUX=disabled in the /etc/selinux/config file as shown below:
 
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#       enforcing - SELinux security policy is enforced.#       permissive - SELinux prints warnings instead of enforcing. 
#       disabled - No SELinux policy is loaded. 
SELINUX=disabled 
# SELINUXTYPE= can take one of these two values: 
#       targeted - Targeted processes are protected, 
#       mls - Multi Level Security protection. 
SELINUXTYPE=targeted 

Reboot your system. After reboot, confirm that the getenforce command returns Disabled:
# getenforce
Disabled