OS:
https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/index.html
database:
https://www.oracle.com/technetwork/database/enterprise-edition/downloads/oracle19c-linux-5462157.html
安装前准备工作：
[root@ora12c ~]# yum -y localinstall oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm
开始安装数据库：
[root@ora12c ~]# yum -y localinstall oracle-database-ee-19c-1.0-1.x86_64.rpm
安装路径为：/opt/oracle
OEL 7.6 RPM方式安装oracle atabase19c
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