linux环境下单server分区数据库环境配置问题

我在虚拟机上的linux安装了db29.7的数据库,操作系统和数据库版本如下：
Linux version 2.6.32-358.el6.x86_64 ([email]mockbuild@c6b8.bsys.dev.centos.org[/email]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Fri Feb 22 00:31:26 UTC 2013

DB21085I  Instance "db2inst1" uses "64" bits and DB2 code release "SQL09076"
with level identifier "08070107".
Informational tokens are "DB2 v9.7.0.6", "s120516", "IP23328", and Fix Pack
"6".
Product is installed at "/opt/ibm/db2/V9.7".

数据库配置如下：
/etc/services:
DB2c_db2inst1   60000/tcp
DB2_db2inst1    60001/tcp
DB2_db2inst1_1  60002/tcp
DB2_db2inst1_2  60003/tcp
DB2_db2inst1_3  60004/tcp
DB2_db2inst1_END        60005/tcp

/etc/hosts:
192.168.116.128 testhost

￥HOME/sqllib/db2nodes.cfg：
0 testhost 0
1 testhost 1

db2inst1用户下rsh执行正常：
[db2inst1@testhost ~]$ rsh testhost date
Mon Aug  5 14:25:23 CST 2013

在这种情况下停止或者启动实例总是报错：
SQL6048N  A communication error occurred during START or STOP DATABASE MANAGER processing.
排查了很多地方，重启多次测试多次依然不行，求解答。收起