oracle启动流程

1.切换为oracle用户：su - oracle，如：

$su - oracle

2..启动监听器：lsnrctl status，如：

[oracle@master ~]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 27-FEB-2018 02:56:32

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Starting /opt/oracle_11/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.3.0 - Production

System parameter file is /opt/oracle_11/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Log messages written to /opt/oracle_11/app/diag/tnslsnr/master/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=master)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production

Start Date                27-FEB-2018 02:57:34

Uptime                    0 days 0 hr. 0 min. 0 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /opt/oracle_11/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File         /opt/oracle_11/app/diag/tnslsnr/master/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=master)(PORT=1521)))

The listener supports no services

The command completed successfully

3..查看监听器状态：lsnrctl status，如：

[oracle@master ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 27-FEB-2018 02:58:15

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production

Start Date                27-FEB-2018 02:57:34

Uptime                    0 days 0 hr. 0 min. 40 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /opt/oracle_11/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File         /opt/oracle_11/app/diag/tnslsnr/master/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=master)(PORT=1521)))

The listener supports no services

The command completed successfully

4.查询oracle进程
[oracle@www ~]$ ps -ef | grep  oracle

5.启动数据库
$ sqlplus / as sysdba //as前有个空格
SQL> startup

或

$:su - oracle
$:sqlplus /nolog
sql>conn / as sysdba

6.切换数据库用户；

sql>conn demo/demo

7.查询当前用户
SQL> show user

8.显示当前的所有用户表
select * from user_tables

9..关闭数据库

SQL> shutdown 正常关闭

SQL>shutdown abort 强制关闭

10.退出sql控制台

SQL>exit;

11.停止监听器
[oracle@www ~]$ lsnrctl stop

12.重启监听器

[oracle@www ~]$ lsnrctl reload