centos7.6启动oracle11g服务1 登录系统
切换到oracle⽤户
[root@oracle ~]# su - oracle
2 查看监听
查看监听，发现监听没起来
[oracle@oracle ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 04:06:18
Copyright (c) 1991, 2009, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
3 启动监听
[oracle@oracle ~]$ lsnrctl start
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 04:06:23
Copyright (c) 1991, 2009, Oracle.  All rights reserved.
Starting /software/oracle/product/11.2.0/dbhome_1/bin/tnslsnr:
TNSLSNR for Linux: Version 11.2.0.1.0 - Production
System parameter file is /software/oracle/product/11.2.0/dbhome_1/network/a
Log messages written to /software/oracle/diag/tnslsnr/oracle/listener/l
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle)(PORT=1521))) STATUS of the LISTENER
------------------------
Alias                    LISTENER
Version                  TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                30-JUN-2020 04:06:23
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level              off
Security                  ON: Local OS Authentication
SNMP                      OFF
linux系统安装oracle11gListener Parameter File  /software/oracle/product/11.2.0/dbhome_1/network/a Listener Log File        /software/oracle/diag/tnslsnr/oracle/listener/l
Listening
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
The listener supports no services
The command completed successfully
如果启动监听报错。
1、查看a⽂件ip或主机名是否错误；
2、使⽤netca重新配置监听；
4 启动实例
使⽤sqlplus⼯具连接数据库
[oracle@oracle ~]$ sqlplus /nolog
SQL*Plus: Release 11.2.0.1.0 Production on Tue Jun 30 04:17:13 2020 Copyright (c) 1982, 2009, Oracle.  All rights reserved.
SQL> conn / as sysdba
Connected to an idle instance.
SQL> show user;
USER is "SYS"
startup命令启动数据库实例
关闭数据库实例命令为：shutdown immediate;
SQL> startup
;
ORACLE instance started.
Total System Global Area  826753024 bytes
Fixed Size                  2217872 bytes
Variable Size            494930032 bytes
Database Buffers          322961408 bytes
Redo Buffers                6643712 bytes
Database mounted.
Database opened.
5 使⽤PL/SQL⼯具连接数据库即可

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