HI I have downloaded and tried with both libvirt-0-6-2 %libvirt-0-6-4 versions to build the One Driver from the source directory I executed the following commands to install libvirt hexagrid@hexagrid-desktop:~$ virsh -c one:/// error: failed to connect to the hypervisor hexagrid@hexagrid-desktop:~$ let me know whether I have performed the right steps to install or anything is missing. but I am able to connect to QEMU driver and the out of the execution is as follows hexagrid@hexagrid-desktop:~$ virsh -c qemu:///session Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit -- Thanks and Regards Thirupalu Annam ---------------------------------------- Hexagrid Networks Office :23350089, 40144654 Mob:9908377725