一个测试库，sqlplus登录时无法使用os验证
```
$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Wed Jun 29 16:51:32 2021
Copyright (c) 1982, 2013, Oracle. All rights reserved.
ERROR:
ORA-01017: invalid username/password; logon denied
```
**查看sqlnet.ora**
无配置,通过情况下默认是启用os验证的,也可以显示指定：
```
SQLNET.AUTHENTICATION_SERVICES = (ALL)
```
**查看oracle用户**
```
$ id oracle
uid=54321(oracle) gid=54321(oinstall) 组=54321(oinstall)
```
**缺少dba组**
```
usermod -G oinstall,dba oracle
```操作系统验证报ORA-01017
原文：https://blog.51cto.com/hunt1574/2960136
