一：操作系统镜像下载
二：Oracle VM VirtualBox下载
三：Oracle 11.2.0.4.0安装介质下载
四：Grid Infrastructure 11.2下载
五：DNS软件下载
一：操作系统镜像下载
Oracle Linux 6.3，oel6.3DVD x86-64.iso，3.42G
https://www.oracle.com/cn/downloads/
https://edelivery.oracle.com/osdc/faces/SoftwareDelivery
二：Oracle VM VirtualBox下载
Oracle VM VirtualBox 6.1.6
https://www.oracle.com/cn/downloads/
https://www.oracle.com/virtualization/technologies/vm/downloads/virtualbox-downloads.html
三：Oracle 11.2.0.4.0安装介质下载
Oracle 11.2.0.4.0
https://www.oracle.com/cn/downloads/
Patch Set 11.2.0.4 for Linux and Solaris is now available on support.oracle.com. Note: it is a full installation (you do not need to download 11.2.0.1 first). See the README for more info (login to My Oracle Support required).
www.oracle.com不支持Linux x86-64平台Oracle 11.2.0.4安装包的下载，需要support.oracle.com网站下载。
https://support.oracle.com
数据库/GI PSU，SPU(CPU)，Bundle Patches 和 Patchsets 补丁号码快速参考 (Doc ID 1922396.1)
Oracle 11.2.0.4.0下载前两个安装包：
p13390677_112040_Linux-x86-64_1of7.zip
p13390677_112040_Linux-x86-64_2of7.zip
support.oracle.com有时会进行维护，一般维护时间不会太长。
四：Grid Infrastructure 11.2下载
Grid Infrastructure 11.2下载前第三个安装包
p13390677_112040_Linux-x86-64_3of7.zip
五：DNS软件下载
DNS不需要单独下载，使用本地yum安装即可。
[root@dns01 ~]# yum install bind
[root@dns01 ~]# yum install bind-chroot
[root@dns01 ~]# yum install caching-nameserver
更多数据库相关学习资料，可以查看我的ITPUB博客，网名chenoracle：
http://blog.itpub.net/29785807/
