Connect to Oracle yum linux server

Oracle Linux 7
# cd /etc/yum.repos.d
# wget http://public-yum.oracle.com/public-yum-ol7.repo
Oracle Linux 6
# cd /etc/yum.repos.d
# wget http://public-yum.oracle.com/public-yum-ol6.repo
Oracle Linux 5
# cd /etc/yum.repos.d
# wget http://public-yum.oracle.com/public-yum-el5.repo