Hi, It was working fine on March 8th, but today it failed to do virsh command with an error message. # virsh list libvir: error : no support for hypervisor lt-virsh: error: failed to connect to the hypervisor This message is printed here because nb_network_drivers is 0. --- libvirt.c : virConnectOpen 317 if (ret->nb_drivers == 0 || ret->nb_network_drivers == 0) { 318 /* we failed to find an adequate driver */ 319 virLibConnError(NULL, VIR_ERR_NO_SUPPORT, name); 320 goto failed; 321 } I think the cause is because it failed to bind the socket at qemuOpenClientUNIX. --- qemu_internal.c : qemuOpenClientUNIX 232 /* 233 * now bind the socket to that address and listen on it 234 */ 235 if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { They are setting members of sockaddr: {sun_family = 1, sun_path = "/usr/var/run/libvirt/qemud-sock", '\0'} and connect returned -1 with errno that was 2(ENOENT). Is there any problem? Please tell me how I can use current virsh command.