Hello, I'm build amazon micro instance based on Amazon Ec2 AMI and I have kernel version: - 3.4.43-43.43.amzn1.x86_64 Code: # $ s cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU E5507 @ 2.27GHz stepping : 5 microcode : 0x11 cpu MHz : 2266.746 cache size : 4096 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up rep_good nopl nonstop_tsc pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm dtherm bogomips : 4533.49 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: What I'm trying to figure it out is to how enable NX(No Execute) Protection on that virtual instance. I tried installing pae kernel but it looks like package is not found for this distro. I think it might be something related specifically to that AMI and maybe someone had an issue like that in the past, so any input is appreciated. Thanks !!