DIhosts文件权限不足，导致启动DI失败

现象：启动DI instanse D01出错。

进入PRD2(DI)以用户prdadm启动：

ERPPRD2:prdadm 2> startsap R3 D01 ERPDI
Checking db6 db Database
------------------------------
Database is not available via R3trans

Database db6 db must be started first

     执行R3trans –x 测试：

ERPPRD2:prdadm 8> R3trans -x
This is R3trans version 6.19 (release 720 - 06.04.10 - 16:31:00 with UA1430.1 / prepared for CSN 1287305).
unicode enabled version
2EETW169 no connect possible: "DBMS = DB6                              --- DB2DBDFT = 'PRD'"

R3trans finished (0012).

     查看目录/home/prdadm下的trans.log，其中R3trans报错如下：

ERROR in DB6Connect[dbdb6.c, 1737] CON = 0 (BEGIN)          
DbSlConnectDB6( SQLConnect ): [IBM][CLI Driver] SQL1336N  The remote host "ERPDB" was not found.  SQLSTATE=08001 

     现在看来原因是PRD2无法识别ERPDB，为什么呢？？？！！！

     难道是hosts设置有问题，对比PRD1与PRD2的/etc/hosts，内容完全正确，但是PRD2的hosts文件权限为640，而PRD1为644，可能某次备份hosts不小心修改了属性。将PRD2的/etc/hosts访问属性改为644，执行R3trans –x：

ERPPRD2:prdadm 8> R3trans -x
This is R3trans version 6.19 (release 720 - 06.04.10 - 16:31:00 with UA1430.1 / prepared for CSN 1287305).
unicode enabled version
R3trans finished (0000).

     启动D01成功