robo@robo:~$ sudo /etc/init.d/libvirt-bin start
[sudo] password for robo:
 * Starting libvirt management daemon libvirtd/usr/sbin/libvirtd: /usr/local/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_1.2.2' not found (required by /usr/sbin/libvirtd)
After installing libvirt from source a lot of  Ubuntu user face this issue, as i searched on internet about this, no solution works. this is mostly in case of ubuntu users  as mentioned in many posted threads. so please help us as soon as possible. (this is only in case of installation libvirt from source)