非oracle用户登录数据库问题

以前一直在服务器上的使用oracle用户操作数据库,今天切换了另外一个用户,已经将该用户添加到dba组里,但是无法登录
[etl@node1 shell]$ whoami
etl

[etl@node1 shell]$ sqlplus /nolog


SQL*Plus: Release 11.2.0.1.0 Production on Fri Feb 28 14:10:09 2014


Copyright (c) 1982, 2009, Oracle.  All rights reserved.


SQL> connect hxl/hxl@myrac_kettle
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


tnsnames.ora文件的内容如下,没有发现不对的地方,因为oracle用户是可以使用该tns登录的.
[oracle@node1 admin]$ more tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/product/oracle/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.


RACDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = hxlscan)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = racdb)
    )
  )


myrac_kettle =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.201)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.202)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = kettle)
      (FAILOVER_MODE =
        (TYPE = SELECT)
        (METHOD = BASIC)
        (RETRIES = 180)
        (DELAY = 5)
      )
    )
  )

估计是该文件的权限问题,修改文件的权限后,问题解决.

[oracle@node1 admin]$ chmod 755 tnsnames.ora 
[oracle@node1 admin]$ ls -al
total 20
drwxr-xr-x  3 oracle oinstall 4096 Feb 28 14:09 .
drwxr-xr-x 11 oracle oinstall 4096 Feb 25 17:11 ..
drwxr-xr-x  2 oracle oinstall 4096 Feb 25 17:02 samples
-rw-r--r--  1 oracle oinstall  187 May  7  2007 shrept.lst
-rwxr-xr-x  1 oracle oinstall  731 Feb 28 14:09 tnsnames.ora


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