OVM
From pressy's brainbackup
Public Yum Repository
For any strange reason the OVM installation does not come with a yum entry to update the servers. You will have to create the yum repo file and enter:
# vi //etc/yum.repos.d/public-yum-ovm3.repo [ovm3_latest] name=Oracle VM Server 3 Latest ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleVM/OVM3/34_latest/x86_64 gpgkey=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6 gpgcheck=1 enabled=1 # yum update