这种一般的错误，就是配置文件的问题，和连接权限的问问，好好细细检查一遍。
是不是没有权限读啊。
15:37:22IBM Informix Dynamic Server Started.
Mon Feb 13 15:37:24 2012
15:37:24Warning: ONCONFIG dump directory (DUMPDIR) '/informix.dump' has insecure permissions
15:37:24Event alarms enabled.ALARMPROG = '/home/informix/etc/no_log.sh'
15:37:24Booting Language <c> from module <>
15:37:24Loading Module <CNULL>
15:37:24Booting Language <builtin> from module <>
15:37:24Loading Module <BUILTINNULL>
15:37:30DR: DRAUTO is 0 (Off)
15:37:30DR: ENCRYPT_HDR is 0 (HDR encryption Disabled)
15:37:30Event notification facility epoll enabled.
15:37:31IBM Informix Dynamic Server Version 11.50.FC6 Software Serial Number AAA#B000000
15:37:31Warning: stat() failed for chunk file /informix.links/nac/rootchk
15:37:31Cannot Open Primary Chunk '/informix.links/nac/rootchk', errno = 2
15:37:31oninit: Fatal error in shared memory initialization
15:37:31IBM Informix Dynamic Server Stopped.