[oracle@pxc2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 8 23:38:28 2021

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup;
ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/opt/oracle/product/11.2.4/db_1/dbs/initipap.ora'

换了sid后 startup 启动报错

通过oraenv  输入新的sid名称。

[oracle@pxc2 dbs]$ source oraenv
ORACLE_SID = [ipap] ? orcl2
The Oracle base remains unchanged with value /opt/oracle
[oracle@pxc2 dbs]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 8 23:51:15 2021

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> startup;
ORA-01081: cannot start already-running ORACLE - shut it down first
SQL> show parameter name ;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
cell_offloadgroup_name string
db_file_name_convert string
db_name string orcl2
db_unique_name string orcl2
global_names boolean FALSE
instance_name string orcl2
lock_name_space string
log_file_name_convert string
processor_group_name string
service_names string orcl2
SQL>