增加temp表空间数据文件报错：

SQL> alter tablespace temp add tempfile '+DATADG';

alter tablespace temp add tempfile '+DATADG'

*

ERROR at line 1:

ORA-01119: error in creating database file '+DATADG'

ORA-17502: ksfdcre:4 Failed to create file +DATADG

ORA-15001: diskgroup "DATADG" does not exist or is not mounted

ORA-01017: invalid username/password; logon denied

datadg磁盘组正常mount，数据库也能正常起来。

oracle mos查找，找到一篇文档"ORA-17502 /ORA-01017: invalid username/password; logon denied "?(Doc ID 2610682.1)

经过对比发现"/etc/group" 未显示 "oracle" user 对应为 "oinstall" 组。

修改用户组：

usermod -g oinstall -G oinstall,dba oracle

usermod -g oinstall -G oinstall,dba grid