[oracle@test ~]$ lsnrctl stop listener_demo92 -->停止监听，可以看出不需要任何密码即可停止 LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 26-JUN-2011 08:22:26 Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) The command completed successfully2. 重新启动监听并设置密码
[oracle@test ~]$ lsnrctl LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 26-JUN-2011 08:24:09 Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved. Welcome to LSNRCTL, type "help" for information. LSNRCTL> set current_listener listener_demo92 -->设置当前监听器 Current Listener is listener_demo92 LSNRCTL> start -->启动过程也不需要任何密码,启动的详细信息省略 LSNRCTL> change_password -->使用change_password来设置密码 Old password: New password: Reenter new password: Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) Password changed for listener_demo92 The command completed successfully LSNRCTL> save_config -->注意此处的save_config失败 Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) TNS-01169: The listener has not recognized the password LSNRCTL> set password -->输入新设定的密码验证 Password: The command completed successfully LSNRCTL> save_config -->再次save_config成功 Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) Saved listener_demo92 configuration parameters. Listener Parameter File /oracle/92/network/admin/listener.ora Old Parameter File /oracle/92/network/admin/listener.bak The command completed successfully -->增加密码之后可以看到listener.ora文件中有一条新增的记录，即密码选项(注：尽管使用了密码管理方式,仍然可以无需密码启动监听) [oracle@test admin]$ more listener.ora #----ADDED BY TNSLSNR 26-JUN-2011 05:12:48--- PASSWORDS_listener_demo92 = #--------------------------------------------3. 尝试未使用密码的情况下停止监听
[oracle@test ~]$ lsnrctl stop listener_demo92 LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 26-JUN-2011 06:09:51 Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) TNS-01169: The listener has not recognized the password -->收到错误信息，需要使用密码认证4. 使用密码来停止监听
[oracle@test ~]$ lsnrctl LSNRCTL> set current_listener listener_demo92 Current Listener is listener_demo92 LSNRCTL> stop Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) TNS-01169: The listener has not recognized the password LSNRCTL> set password Password: The command completed successfully LSNRCTL> stop Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) The command completed successfully LSNRCTL> status Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=test)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 2: No such file or directory5. save_config失败的问题
-->在 Oracle 9i中，使用save_config命令将会失败 LSNRCTL> save_config Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=<hostname>)(PORT=<port>))) TNS-01169: The listener has not recognized the password -->应该先使用set password之后再save_config，则保存配置成功。 LSNRCTL> set password Password: <the password you chose> The command completed successfully /*在Oracle 10g 中不会出现类似的问题，因为在10g中可以使用基于操作系统验证方式。listener将检测到如果用户属于dba组的成员， 将会被授予改变密码，保存配置以及停止监听等权限。 */6. 配置listener.ora中ADMIN_RESTRICTIONS参数 参数作用： 当在listener.ora文件中设置了ADMIN_RESTRICTIONS参数后，在监听器运行时，不允许执行任何管理任何，同时set命令将不可用 ，不论是在服务器本地还是从远程执行都不行。此时对于监听的设置仅仅通过手工修改listener.ora文件，要使修改生效，只能 使用lsnrctl reload命令或lsnrctl stop/start命令重新载入一次监听器配置信息。 修改方法： 在listener.ora文件中手动加入下面这样一行
ADMIN_RESTRICTIONS_<监听器名> = ON
7. 更多参考
有关性能优化请参考
有关ORACLE体系结构请参考
有关闪回特性请参考
有关基于用户管理的备份和备份恢复的概念请参考
(详细描述了介质恢复及其处理)
有关RMAN的备份恢复与管理请参考
有关ORACLE故障请参考
有关ASM请参考
有关SQL/PLSQL请参考
有关ORACLE其它特性