After cloning a virtual machine running Ubuntu Server 10.04 found that it didn’t have any network available.Restarting networking gave: sudo /etc/init.d/networking restart * Reconfiguring network interfaces... eth0: ERROR while getting interface flags: No such device SIOCSIFADDR: No such device eth0: ERROR while getting interface flags: No such device SIOCSIFNETMASK: No such device SIOCSIFBRDADDR: No such device eth0: ERROR while getting interface flags: No such device eth0: ERROR while getting interface flags: No such device Failed to bring up eth0. The problem lies in the fact that ethernet MAC addresses are cached. You need to remove a file to clear the cached value: sudo rm /etc/udev/rules.d/70-persistent-net.rules After a restart of your server you should have networking back again.