creating 70-persistent-net.rules

[Robert Moskowitz]

This is on a f20 arm system, but it should be like any F20 system. Yeah, 
famous last words.

So I want a 70-persistent-net.rules so I can specify the MAC address to 
the device name.  Then in the ifcfg-xxxx I can change the MACADDR to 
what I want.

I got this working on my Redsleeve arm system, but now I need it on my 
F20 arm system.

So I have done a little searching on creating 70-persistent-net.rules, 
and I come up with two commands:

udevadm trigger
udevadm trigger --action=add

I have run both and no 70-persistent-net.rules

help please...