Description of problem: Currently I have using RHEL4 Update 3 Linux and I have disabled selinux during Kick Start Installation and now i want to enable selinux to both the machines I have tried to enable the selinux using GUI tools system-config-securitylevel->selinux->Enabled (Modification Requires Reboot) After reboot I have executed the getseboll command i am getting the following message getsebool: SELinux is disabled sestatus SELinux status: disabled I have executed following command to enable the selinux setenforce 1 but i am getting the following message only setenforce: SELinux is disabled I have verified selinux rpm are installed or not rpm -qa | grep -i -e selinux selinux-doc-1.14.1-1 libselinux-1.19.1-7 libselinux-devel-1.19.1-7 selinux-policy-targeted-sources-1.17.30-2.126 selinux-policy-targeted-1.17.30-2.126 I don't know what is the problem or i have done wrongly Version-Release number of selected component (if applicable): RHEL4 Update 3 How reproducible: Steps to Reproduce: 1.Disbale Selinux During Kick Start Installation 2. 3. Actual results: Selinux is disabled Expected results: Selinux enabled Additional info: