kernel.randomize_va_space = 1

I am trying to set exec-shield protection on Linux as described here but getting the following error on Ubuntu Linux server version 12.04 LTS:

sysctl -w kernel.exec-shield=1
error: “kernel.exec-shield” is an unknown key

How do I fix this problem and make sure exec-shield buffer overflow protection security feature turned on Ubuntu Linux?

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Now that I have Cent OS (RHEL clone) installed on my IBM server, I’m wondering what is ExecShield and how do I disable the same?

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