WAS7中间件安装的hostname问题

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系统环境：
安装SAS9.3，
OS：RHEL6.3
中间件：WAS7.0.0.11 Network Deployment(注：SAS官方要求版本为：7.0.0.15)
需要自定义plan：http：//support.sas.com/planapp,选择3 machine3（Server、Middle tier and client）,中间件选：WAS ND

WAS安装配置需求：
用root帐号安装，选择指定目标服务器为NONE，Enable Administrative Security不选。

在配置Middle Tier时，执行到Configure IBM WebSphere Application Server Network Deployment时报错：
[echo] [8/30/13 20:33:02:480 CST] - CommandProcess-run: ------------> Begin Command Output <------------
     [echo] [8/30/13 20:33:02:481 CST] - The following validation errors were present with the command line arguments:
     [echo] [8/30/13 20:33:02:481 CST] - hostName: hostName is not a properly formed host name.
     [echo] [8/30/13 20:33:02:482 CST] - CommandProcess-run: ------------> End   Command Output <------------
     [echo] [8/30/13 20:33:02:482 CST] - CommandProcess-run: ------------> Command processing ended; Exit value: 1
     [echo] [8/30/13 20:33:02:483 CST] - DmgrProfile-create: Command Return code: 1
     [echo] [8/30/13 20:33:02:484 CST] - DmgrProfile-create: manageprofiles create "SASDmgr01" profile status is: unknown...
     [echo] [8/30/13 20:33:02:495 CST] - **SEVERE** DmgrProfile-create: The WebSphere "manageprofiles.sh" command has generated an unknown error.
     [echo]            Please ensure the WebSphere "profileRegistry.xml" file and the "profiles" directory are valid and do not contain references to the "SASDmgr01" profile before attempting "Retry"
     [echo] .           Also, ensure your userId has write privileges to the appropriate WebSphere directories.
     [echo] [8/30/13 20:33:02:495 CST] - WASDriver-parseTask: RC=-99 from executeTask(create,DmgrProfile,SASDmgr01,CELL)
     [echo] [8/30/13 20:33:02:498 CST] - **SEVERE** WASDriver-parseTask: Task "create DmgrProfile" execution FAILED; (Result is: "SEVERE-ERROR")
     [echo] [8/30/13 20:33:02:498 CST] - **********  End   "create DmgrProfile" Task Processing  **********
     [echo] [8/30/13 20:33:02:498 CST] - WASDriver-prepareTask: RC=-99 from parseTask()
     [echo] [8/30/13 20:33:02:499 CST] - **SEVERE** WASDriver-main: Severe error has occurred; requested tasks have not been completed.
     [echo] *============ End   WASDriver Output ============*
     [echo] *============ WASDriver Return Code: 157
     [echo] CFG-WAS:  **ERROR** WASDriver configuration FAILED; cannot continue.
[propertyfile] Updating property file: /sas93/config/Lev1/Logs/Configure/webspherend_config_status.properties
[propertyfile] Updating property file: /sas93/config/Lev1/Logs/Configure/webspherend_config_status.properties

BUILD FAILED

google上查：hostName is not a properly formed host name
得知，WAS对hostname有要求，不能含下划线"_"，于是只好再修改hostname，使其不含下划线。
这个隐藏在WAS里的“潜规则”害人不浅，经历了不少的折腾，才找到root cause。。。。无语啊！