Using Centos update repositories for Oracle Unbreakable Linux

You can use Centos with yum for Oracle Unbreakable Linux. Use this on test instance only.
Move or delete other .repo files in /etc/yum.repos.d.
Create a file named centos.repo in /etc/yum.repos.d directory, containing these lines:

################## start

[base]
name=CentOS-$releasever
baseurl=http://ftp.nara.wide.ad.jp/pub/Linux/centos/4.6/os/i386/
gpgcheck=1
gpgkey=http://ftp.nara.wide.ad.jp/pub/Linux/centos/4.6/os/i386/RPM-GPG-KEY-centos4

[update]
name=CentOS-$releasever - Updates
baseurl=http://ftp.nara.wide.ad.jp/pub/Linux/centos/4.6/updates/i386/
gpgcheck=1
gpgkey=http://ftp.nara.wide.ad.jp/pub/Linux/centos/4.6/os/i386/RPM-GPG-KEY-centos4

################ end

You can change baseurl and gpgkey with other mirror. You can see list of mirrors here http://www.centos.org/modules/tinycontent/index.php?id=13
This script is for version 4.6. Change version number if needed.