On 12/15/2010 02:19 PM, arnaud.champion(a)devatom.fr wrote: http://libvirt.org/uri.html#URI_qemu System URIs connect to the system libvirtd daemon (started by system init scripts), which is shared among all users on the machine, and which allows access to anything that requires superuser capabilities (such as creating tun devices for networking). Session URIs connect to a per-user daemon (which will be started automatically if needed), and which cannot access anything that the user cannot access (and unfortunately, given that no one has yet figured out how to make Linux share tun devices with ordinary users, that means that session guests are currently rather limited because they will not have networking support). The goal is to make things support full virtualization under session URIs, once the kernel adds the support we need for networking. -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org