linux平台上面oracle不是自动启动的，需要手动进行，具体操作如下

（一）?

在命令模式下面先启动监听：

?

#>lsnrctl start

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这个命令会执行较长时间，需要耐心等待，成功后会出现这样的信息：

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 03-DEC-2010 15:26:25

Copyright (c) 1991, 2005, Oracle.? All rights reserved.

Starting /opt/oracle/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /opt/oracle/10.2.0/db_1/network/admin/listener.ora
Log messages written to /opt/oracle/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.16)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias???????????????????? LISTENER
Version?????????????????? TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date??????????????? 03-DEC-2010 15:26:27
Uptime??????????????????? 0 days 0 hr. 3 min. 9 sec
Trace Level?????????????? off
Security????????????????? ON: Local OS Authentication
SNMP????????????????????? OFF
Listener Parameter File?? /opt/oracle/10.2.0/db_1/network/admin/listener.ora
Listener Log File???????? /opt/oracle/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
? (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
? (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.16)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
? Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "kids21" has 1 instance(s).
? Instance "kids21", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

（二）

在命令模式下登录到sqlplus

#>sqlplus /nolog

（三）

转接到数据库，这个时候，数据库还没有启动，只启动了监听

sql>connect /as sysdba

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这个地方，如果输入用户名和密码写成：

sql>connect sys/kids21这样的方式连接的话有可能出现这样的错误：

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ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory

如果写成这样：

sql>connect sys/kids21@kids21这样的方式连接的话可能出来这样的错误：

ORA-12505: TNS: 监听程序当前无法识别连接描述符中所给出的SID

原因是listener.ora里面是这样配置的：

# listener.ora Network Configuration File: /opt/oracle/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
? (SID_LIST =
??? (SID_DESC =
????? (SID_NAME = PLSExtProc)
????? (ORACLE_HOME = /opt/oracle/10.2.0/db_1)
????? (PROGRAM = extproc)
??? )
? )

LISTENER =
? (DESCRIPTION_LIST =
??? (DESCRIPTION =
????? (ADDRESS = (PROTOC