SID-cek sid oracle

 dbsa@dbsa-X406UA:~$ ssh root@172.17.10.47

root@172.17.10.47's password:  
Last login: Thu Apr 15 15:58:30 2021
[root@epsdc53 ~]# su - oracle
Last login: Kam Apr 15 15:54:10 WIB 2021 from 172.17.10.102 on pts/3
[oracle@epsdc53 ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Fri Apr 16 13:45:05 2021

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

SQL> connect /as sysdba;
Connected.
SQL> select sys_context('userenv','db_name') from dual;

SYS_CONTEXT('USERENV','DB_NAME')
--------------------------------------------------------------------------------
EPSDC53

SQL>