This feature is still in development!
Freeze the state of a virtual machine instance using snapshot functionality. It is possible to snapshot a running virtual machine, but it takes quite a while. Create a snapshot like:
$ vm cd lxdev01
$ vm image snapshot create
Domain snapshot 1325599831 created
Unfortunately it is not yet possible to label the snapshots. Display all available snapshots for a virtual machine instance with:
$ vm image snapshot list
Name Creation Time State
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1325599831 2012-01-03 15:10:31 +0100 shutoff
Revert a virtual machine instance to a snapshot using its timestamp:
$ vm image snapshot restore 1325599831