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See also Citrix XenServer and Xen Cloud Platform (XCP)
See also XenServer Backup System
See also XenServer Backup CLI
http://grantmcwilliams.com/tech/virtualization/xcp-howtos
XCP is basically an open-source version of Citrix XenServer.
http://lists.xen.org/archives/html/xen-users/2011-10/msg00539.html
Update the kernel in 1.6.10:
yum --enablerepo xcp --nogpgcheck update reboot