Basically after cloning such a template machine (e.g. using CloneZilla), the most important thing after starting the clone is to change the hostname - and here is how to do it:
There are two files to edit - and you should edit them in this order - just changing the hostname (in total should be 3 times occuring):
sudo vim /etc/hosts
127.0.0.1 nowthenewhostname localhost.localdomain localhostsudo vim /etc/hostname
For those not familiar with vim - just press "i" to get into edit mode and when finished press "ESC" and enter ":x" followed by pressing "Enter".
And sure, you can use gedit instead of vim also.
See also more information on Cloning Ubuntu to Different Computer Hardware.
Related post: Virus scanning on Ubuntu, Stationary under Ubuntu.