ORACLE 数据库实例启动和关闭

[oracle@orcl19c:/home/oracle]$ echo $ORACLE_SID
orcl

[oracle@orcl19c:/home/oracle]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Tue Jul 5 11:10:10 2022
Version 19.13.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.

Connected to an idle instance.

[oracle@orcl19c:/home/oracle]$ ps -ef | grep ora_ | grep -v grep

SYS@orcl> startup
ORACLE instance started.

Total System Global Area 1660941712 bytes
Fixed Size                  9135504 bytes
Variable Size             402653184 bytes
Database Buffers         1241513984 bytes
Redo Buffers                7639040 bytes
Database mounted.
Database opened.

SYS@orcl> select instance_name,status from v$instance;

INSTANCE_NAME    STATUS
---------------- ------------
orcl             OPEN

ps -ef | grep ora_ | grep -v grep

[oracle@orcl19c:/home/oracle]$ vi $ORACLE_HOME/sqlplus/admin/glogin.sql
set linesize 120
set pagesize 999
define _editor=vi
set sqlprompt "_user'@'_connect_identifier> "

shutdown immediate;