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oracle启动监听及切换实例库_lsnrctl start 数据库实例

lsnrctl start 数据库实例

启动监听服务:============================================================
方法1:
用root以ssh登录到linux,打开终端输入以下命令:
cd $ORACLE_HOME #进入到oracle的安装目录 
dbstart #重启服务器 
lsnrctl start #重启监听器 
cd $ORACLE_HOME #进入到oracle的安装目录
dbstart #重启服务器
lsnrctl start #重启监听器
-----------------------------------
方法2:
Sql代码
cd $ORACLE_HOME/bin #进入到oracle的安装目录 
./dbstart #重启服务器 
./lsnrctl start #重启监听器
-----------------------------------
方法3:
(1) 以oracle身份登录数据库,命令:su -oracle
(2) 进入Sqlplus控制台,命令:sqlplus /nolog
(3) 以系统管理员登录,命令:connect / as sysdba
(4) 启动数据库,命令:startup
(5) 如果是关闭数据库,命令:shutdown immediate
(6) 退出sqlplus控制台,命令:exit
(7) 进入监听器控制台,命令:lsnrctl
(8) 启动监听器,命令:start
(9) 退出监听器控制台,命令:exit
二、重启实例:
(1) 切换需要启动的数据库实例:export ORACLE_SID=C1
(2) 进入Sqlplus控制台,命令:sqlplus /nolog
(3) 以系统管理员登录,命令:connect / as sysdba
(4) 如果是关闭数据库,命令:shutdown abort
(5) 启动数据库,命令:startup
(6) 退出sqlplus控制台,命令:exit

====================================================================================

[oracle@localhost ~]$ env | grep ORA
ORACLE_SID=orcl
ORACLE_BASE=/data/oracle
ORACLE_TERM=xterm
ORACLE_HOME=/data/oracle/product/11.2.0/db_1
[oracle@localhost ~]$ cd $oracle_home
[oracle@localhost ~]$ cd $ORACLE_HOME
[oracle@localhost db_1]$ cd bin
[oracle@localhost bin]$ ./sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Sat Sep 30 09:38:07 2017

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

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area  759943168 bytes
Fixed Size            2217224 bytes
Variable Size          457181944 bytes
Database Buffers      293601280 bytes
Redo Buffers            6942720 bytes
Database mounted.
Database opened.
 
SQL> select count(0) from user_tables;

  COUNT(0)
----------
       956

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@localhost bin]$ lsnrctl start 

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-SEP-2017 09:48:07

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Starting /data/oracle/product/11.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production
System parameter file is /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Log messages written to /data/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                30-SEP-2017 09:48:07
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /data/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))
The listener supports no services
The command completed successfully

查看实例名 

select name from v$database;

select instance_name from v$instance;

show parameter instance;


切换实例==========================================================

export ORACLE_SID=test
export ORACLE_SID=orcl

sqlplus sys/system as sysdba


 

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