Centos7操作系统下安装oracle18c

Oracle官方已经放出18c企业版的rpm安装包，但仅限于单机版安装，相对于之前的版本，省去了前期规划配置的繁琐步骤

1、下载oracle RPM安装包

2、使用yum安装

使用oracle软件源安装，保证RPM安装默认的目录是/opt,安装前确保/opt拥有足够的空间

[root@iZ8vb7sjth4p01s4r1b1emZ backup]# yum -y localinstall oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm

安装oracle18c的RPM软件包

[root@iZ8vb7sjth4p01s4r1b1emZ backup]# yum -y localinstall oracle-database-ee-18c-1.0-1.x86_64.rpm

3、配置oracle 18c数据库

安装完成后会生成两个文件：

1、一个是管理oracle服务的脚本(/etc/init.d/oracledb_ORCLCDB-18c)

修改oracledb_ORCLCDB-18c配置文件

Setting the required environment variables

export ORACLE_HOME=/opt/oracle/product/18c/dbhome_1

export ORACLE_VERSION=18c

export ORACLE_SID=CYCDB

export TEMPLATE_NAME=General_Purpose.

export CHARSET=ZHS16GBK

export PDB_NAME=ERP

export LISTENER_NAME=LISTENER

export NUMBER_OF_PDBS=1

export CREATE_AS_CDB=true

General exports and vars

export PATH=ORACLEHOME/bin:ORACLE_HOME/bin:ORACLEH​OME/bin:PATH

LSNR=ORACLEHOME/bin/lsnrctlSQLPLUS=ORACLE_HOME/bin/lsnrctl

SQLPLUS=ORACLEH​OME/bin/lsnrctlSQLPLUS=ORACLE_HOME/bin/sqlplus

DBCA=ORACLE_HOME/bin/dbca

ORACLE_OWNER=oracle

RETVAL=0

CONFIG_NAME="oracledb_ORACLE_SID-ORACLEVERSION.conf"CONFIGURATION="/etc/sysconfig/ORACLE_VERSION.conf"

CONFIGURATION="/etc/sysconfig/ORACLEV​ERSION.conf"CONFIGURATION="/etc/sysconfig/CONFIG_NAME"

2、另一个是定义数据文件存放路径的文件(/etc/sysconfig/oracledb_ORCLCDB-18c.conf)

修改配置文件oracledb_ORCLCDB-18c.conf

[root@iZ8vb7sjth4p01s4r1b1emZ sysconfig]# cat oracledb_ORCLCDB-18c.conf

#This is a configuration file to setup the Oracle Database.

#It is used when running ‘/etc/init.d/oracledb_ORCLCDB configure’.

#Please use this file to modify the default listener port and the

#Oracle data location.

LISTENER_PORT: Database listener

LISTENER_PORT=1521

ORACLE_DATA_LOCATION: Database oradata location

ORACLE_DATA_LOCATION=/oradata

EM_EXPRESS_PORT: Oracle EM Express listener

EM_EXPRESS_PORT=5500

[root@iZ8vb7sjth4p01s4r1b1emZ sysconfig]#

3、修改完成后，执行/etc/init.d/oracledb_ORCLCDB-18c configure命令创建数据库实例以及监听

[root@iZ8vb7sjth4p01s4r1b1emZ /]# /etc/init.d/oracledb_CYCDB-18c configure

Configuring Oracle Database CYCDB.

Prepare for db operation

8% complete

Copying database files

31% complete

Creating and starting Oracle instance

32% complete

36% complete

40% complete

43% complete

46% complete

Completing Database Creation

51% complete

54% complete

Creating Pluggable Databases

58% complete

77% complete

Executing Post Configuration Actions

100% complete

Database creation complete. For details check the logfiles at:

/opt/oracle/cfgtoollogs/dbca/CYCDB.

Database Information:

Global Database Name:CYCDB

System Identifier(SID):CYCDB

Look at the log file “/opt/oracle/cfgtoollogs/dbca/CYCDB/CYCDB.log” for further details.

Database configuration completed successfully. The passwords were auto generated, you must change them by connecting to the database using ‘sqlplus / as sysdba’ as the oracle user.

[root@iZ8vb7sjth4p01s4r1b1emZ /]#

其实，这个configure就是调用dbca的静默模式创建数据库实例。创建完成后，根据上面的提示修改系统用户的密码即可。

配置

添加环境变量

export ORACLE_HOME=/opt/oracle/product/18c/dbhome_1

PATH=PATH:PATH:PATH:HOME/.local/bin:HOME/bin:HOME/bin:HOME/bin:ORACLE_HOME/bin

修改数据库的密码

SQL> alter user sys identified by “”;

SQL> alter user system identified by “”;