How to solve several issues in Linux after Cloning a VM in KVM

If you run your virtual environment using KVM you will recognize some issues after cloning a virutal machine (eg Ubuntu 10.04 Server).

1. No network connection could be established
2. ssh-keys on all clones are identical
3. hostnames are identical
4. static ip-addresses are identical and lead to trouble in your network

To solve most of these issues follow the very nice instructions of

mikko's log