I am sorry, My Ubuntu info was wrong in previous mail, correct one as follow
>UBUNTU: >[amul@localhost postgresql]$ uname -a >Linux localhost.localdomain 2.6.32-358.6.1.el6.x86_64 #1 SMP Tue Apr 23 >19:29:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux amul@amul:~/work/postgresql$ uname -a Linux amul 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Regards, Amul Sul