With the release of vCloud Director 1.5.1 last night, the operating system for the vCloud Director Cell now supports Red Hat Enterprise Linux 5.7 (x86_64). If you are running your current cell with Red Hat Enterprise Linux 5.6, and you want to upgrade to the most recent release that is supported, here are the steps. Yet, you have to be careful not to upgrade to Red Hat Enterprise Linux 5.8, which as been release the 21st February 2012. RHEL 5.8 is not on the official supported list by VMware. In the following screenshots we will use the yum update tool to make sure we upgrade to RHEL 5.7...