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I installed Centos 5.5 and by deafult SElinux was disabled. I did changes in /etc/selinux/config and now it looks like this.

SELINUX=enforcing
SELINUXTYPE=targeted
SETLOCALDEFS=0

and rebooted the system. But even after the reboot when I do check the sestatus it shows disable. where I'm doing a mistake do I need to change any thing else?

EDIT :
I'm Using Rackspace Cloud server

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You need to be running a kernel that supports SELinux. Most VPS providers use one that doesn't, since no one has cared enough to write SELinux rules that allow their VPS tools/mechanism to work.

Another possibility is that one or more kernel options are being passed via the bootloader which disable it. Check your bootloader configuration.

  • To check current kernel parameters: cat /proc/cmdline – LatinSuD Oct 14 '10 at 8:29
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It seems that if you create a support ticket with Rackspace they can enable SELinux support without using a custom kernel. I suspect they keep alternate kernels available and they simply switch it over on their end.

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