Check to see if SELinux is installed

RedHat, CentOS and SUSE

rpm -qa | grep selinux

Debian and Ubuntu

dpkg --list | grep selinux

Check to see if SELinux (Security-Enhanced Linux) is enabled

sestatus

No response indicates SELinux is not installed/enabled If enabled, edit the /etc/sysconfig/selinux file. This file is a symlink to /etc/selinux/config. The configuration file is self-explanatory. Changing the value of SELINUX or SELINUXTYPE changes the state of SELinux and the name of the policy to be used the next time the system boots.

sudo vi /etc/selinux/config

SELINUX=permissive or enforcing

Change "permissive" or "enforcing" to "disabled".