尝试用非oracle用户启动数据库，碰到这个错误。
错误详细信息为：
enmo@jyoracle:/oracle/admin/enmo>sqlplus / AS sysdba SQL*Plus: Release 10.2.0.4.0 - Production ON Fri DEC 16 20:28:09 2011 Copyright (c) 1982, 2007, Oracle. ALL Rights Reserved. ERROR: ORA-09925: Unable TO CREATE audit trail file IBM AIX RISC System/6000 Error: 2: No such file OR directory Additional information: 9925 ORA-09925: Unable TO CREATE audit trail file IBM AIX RISC System/6000 Error: 2: No such file OR directory Additional information: 9925 Enter user-name: ERROR: ORA-01017: invalid username/password; logon denied Enter user-name: ERROR: ORA-01017: invalid username/password; logon denied SP2-0157: unable TO CONNECT TO ORACLE after 3 attempts, exiting SQL*Plus |
其实这个错误很明显，是由于AUDIT TRAIL文件无法创建所致，导致这个问题多半是由于权限造成的，检查后发现果然如此：
enmo@jyoracle:/oracle/admin/enmo>ls
adump bdump cdump udump
enmo@jyoracle:/oracle/admin/enmo>ls -l
total 0
drwxr-xr-x 2 enmo dba 256 Dec 16 20:17 adump
drwxr-xr-x 2 enmo dba 256 Dec 16 20:14 bdump
drwxr-xr-x 2 enmo dba 256 Dec 16 20:14 cdump
drwxr-xr-x 2 enmo dba 256 Dec 16 20:15 udump
enmo@jyoracle:/oracle/admin/enmo>chmod 775 adump
enmo@jyoracle:/oracle/admin/enmo>sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 – Production on Fri Dec 16 20:29:46 2011
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to an idle instance.
由于当前的用户属于dba组，并非oracle用户，因此如果要数据库可以访问adump目录，应该设置改目录组选项可写。