How do I save state or snapshot of a Nimbus VM

Hi,

I have an account on Future grid that I had created for my research work

I was successful in initiating an instance of a VM on Nimbus, based on the documentation (http://archive.futuregrid.org/tutorials/nimbus) on Future Grid.

However, when I looked for documentation on how to save the state of my VM in order to bring it back on later, I was a little lost.

Could you please help me, by letting me know, as to how to save state or snapshot my VM on Nimbus so that I can initiate the instance of the VM from where I had left off?