oracle21c启动实例报错

新装了一个Oracle21C的环境，更换了system01.dbf的路径，然后起不来实例，经重建控制文件已解决。再次关闭然后启动数据库就报错：

[oracle@localhost ~]$sqlplus / as sysdba
SQL*Plus: Release 21.0.0.0.0 - Production on Wed Jan 19 14:27:47 2022
Version 21.3.0.0.0
Copyright (c) 1982, 2021, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup

ORA-12791: The oradism utility does not have proper permissions.

SQL>

docs.oracle官方解释：

ORA-12791: The oradism utility does not have proper permissions.
Cause: The oradism utility was not root owned and did not have proper permissions.
Action: Change oradism to root owned binary with permission 4750.
查看oradism的文件权限没有错，修改成4750和750都不行。

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如何让实例正常启动？谢谢

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