sqlplus

 $ sqlplus system/password@dbsv:1521/service_name as sysdba

SQL*Plus: Release 18.0.0.0.0 - Production on Wed Feb 21 17:44:10 2024

Version 18.5.0.0.0

Copyright (c) 1982, 2018, Oracle.  All rights reserved.

ERROR:

ORA-01031: insufficient privileges

Enter user-name: 

$ sqlplus system/password@dbsv:1521/service_name 

SQL*Plus: Release 18.0.0.0.0 - Production on Wed Feb 21 17:45:39 2024

Version 18.5.0.0.0

Copyright (c) 1982, 2018, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> oradebug setmypid

ORA-01031: insufficient privileges

※　特権にはOS認証が必要？  リモートでは認証不可？