怎样启动、关闭和重新启动oracle监听器in linux
对于DBA来说，启动和关闭oracle监听器是很基础的任务，但是Linux系统管理员或者程序员有时也需要在开发
数据库中做一些基本的DBA操作，因此了解一些基本的管理操作对他们来说很重要。
本文将讨论用LSNRCTL命令启动、关闭和查看监听器的状态的方法。
怎样启动、关闭和重新启动oracle监听器
在启动、关闭或者重启oracle监听器之前确保使用lsnrctl status命令检查oracle监听器的状态。除了得到监听器的状态之外，你还可以从lsnrctl status命令的输出中得到如下的信息：
监听器的启动时间
监听器的运行时间
监听器参数文件listener.ora的位置，通常位于$ORACLE_HOME/network/admin目录下
监听器日志文件的位置
如果oracle监听器没用运行，你将得到如下的信息
$ lsnrctl status LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 04-APR-2009 16:27:39 Copyright (c) 1991, 2007, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.2)(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 directory $ lsnrctl status LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 04-APR-2009 16:27:39 Copyright (c) 1991, 2007, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.2)(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 directory
如果oracle监听器正在运行，你将得到如下信息
$ lsnrctl status
LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 04-APR-2009 16:27:02
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.2)(PORT=1521)))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.1.0.6.0 - Production
Start Date 29-APR-2009 18:43:13
Uptime 6 days 21 hr. 43 min. 49 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.1.0/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/devdb/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.2)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Services Summary…
Service “devdb” has 1 instance(s).
Instance “devdb”, status UNKNOWN, has 1 handler(s) for this service…
Service “devdb.thegeekstuff.com” has 1 instance(s).
Instance “devdb”, status READY, has 1 handler(s) for this service…
Service “devdbXDB.thegeekstuff.com” has 1 instance(s).
Instance “devdb”, status READY, has 1 handler(s) for this service…
Service “devdb_XPT.thegeekstuff.com” has 1 instance(s).
Instance “devdb”, status READY, has 1 handler(s) for this service…
The command completed successfully
$ lsnrctl status
LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 04-APR-2009 16:27:02
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.2)(PORT=1521)))
STATUS of the LISTENER
————————
Alias LI