title: CentOS 70-persistent-net.rules will not regenerate
body: <p>I am running CentOS 5.5 as VirtualBox guest on a Win 7 host.</p>
  
  <p>It is a common problem in the forums that moving images across VMs encounters networking issues due to the MAC address persistence in /etc/udev/rules.d/70-persistent-net.rules. A solution typically proposed is to delete this file and reboot for it to be automatically regenerated.</p>
  
  <p>In my case however, I cannot get the file to regenerate, despite multiple reboots with different VM network interface options. I became fairly hopeful when introduced to udevadm on an Ubuntu forum but could not find an equivalent for CentOS.</p>
  
  <p>Specifying the new MAC address in /etc/sysconfig/network-scripts/ifcfg-eth0 has not helped, and neither has playing around with different network configurations in the manager.</p>
  
  <p>Any pointers/assistance much appreciated.</p>