I am using Amazon Linux. uname -a gives followng result Linux <ip> 3.2.22-35.60.amzn1.x86_64 #1 SMP Thu Jul 5 14:07:24 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Posted at Nginx Forum: http://forum.nginx.org/read.php?2,231695,231707#msg-231707