年底了一直很忙，今天忙中偷闲安装了一下Oracle18C的RPM包安装方法。总的感觉还是比较方便的，大大的简化了oracle 的安装，让非专业的DBA也有了比较好的安装体验。下面就带来我安装过程中的一些步骤分享：

  1. 环境介绍：
    OS： Redhat 7.5 ， Mem 4G， CPU 4C，DISK 200G

    Red Hat Enterprise Linux Server release 7.5 (Maipo)

  2. 下载rpm安装包：
    oracle-database-ee-18c-1.0-1.x86_64.rpm
    oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm

  3. 安装步骤
    3.1 配置yum
    #cd /etc/yum.repos.d
    [rhel7.5]
    name=my_repo
    baseurl=file:///mnt
    gpgcheck=0

    3.2 安装依赖包：
yum -y install xorg-x11-xauth xorg-x11-utils libstdc++-devel libaio-devel ksh  compat-libcap
注意：在redhat7.5中，compat-libstdc++-33这个包是没有，请自行下载，并手动安装。

3.3 安装数据库

    1）yum -y localinstall oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm
    安装提示的信息比较多，此处省略。。。。。

    2）rpm -ivh oracle-database-ee-18c-1.0-1.x86_64.rpm

    warning: oracle-database-ee-18c-1.0-1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
    Preparing... ################################# [100%]
    Updating / installing...
    1:oracle-database-ee-18c-1.0-1 ################################# [100%]
    [INFO] Executing post installation scripts...
    [INFO] Oracle home installed successfully and ready to be configured.
    To configure a sample Oracle Database you can execute the following service configuration script as root: /etc/init.d/oracledb_ORCLCDB-18c configure

    3.4 配置数据库
    在root下执行：

    etc/init.d/oracledb_ORCLCDB-18c configure

    3.5 安装完成后检查

    该步骤执行的时间较长，需要耐心的等待。。。。
    Configuring Oracle Database ORCLCDB.
    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/ORCLCDB.
    Database Information:
    Global Database Name:ORCLCDB
    System Identifier(SID):ORCLCDB
    Look at the log file "/opt/oracle/cfgtoollogs/dbca/ORCLCDB/ORCLCDB.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.

3.5 安装检查
1）Oracle配置环境变量：
[oracle@rhel75-dev-31-81 ~]$ vi .bash_profile

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

export ORACLE_VERSION=18c
export ORACLE_SID=ORCLCDB

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

export PATH 

2）检查监听
lsnrctl status

Service "7f7a654558113bdde055025056a8c790" has 1 instance(s).

Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "ORCLCDB" has 1 instance(s).
Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "ORCLCDBXDB" has 1 instance(s).
Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "orclpdb1" has 1 instance(s).
Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
The command completed successfully

3)登录数据库
sqlplus / as sysdba
[oracle@rhel75-dev-31-81 ~]$ sqlplus / as sysdba

SQL*Plus: Release 18.0.0.0.0 - Production on Tue Jan 15 14:50:55 2019
Version 18.3.0.0.0

Copyright (c) 1982, 2018, Oracle. All rights reserved.

Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.3.0.0.0

  1. 安装后的思考
    1) oracle 18C大大的简化了安装的工作量。对于部署和实施来说比较方便了。
    2) 网络配置自动完成。网络部分系统会自动配置生产listener.ora和tnsnames.ora文件。
    3) 初始化即为容器数据库。

当然还有很多的新的特性，后续的文章会向大家一一阐述，时间有限难免有出错的地方，如有问题请大家及时指正。欢迎讨论。