I tested it on a VM with CentOS 5.5 i386 updated and did not work. Last login: Tue Dec 13 12:48:54 2010 [root@localhost~]#nano full-nelson.c [root@localhost~]#gcc-o full-nelson.c full-nelson [root@localhost~]#./full-nelson [*] Failed to open file descriptors. [root@localhost~]# uname-a Linux localhost.localdomain 2.6.18-194.26.1.el5 # 1 SMP Thu Nov 9 12:54:40 EST 2010 i686 i686 i386 GNU/Linux [root@localhost~]# My 10 cents:) @firebitsbr