课程: Ubuntu Linux: Virtualization

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Clone and snapshot a virtual machine

Clone and snapshot a virtual machine

课程: Ubuntu Linux: Virtualization

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Clone and snapshot a virtual machine

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- [Instructor] Because virtual machines are just represented by disk images and some descriptive text, we can duplicate them and snapshot them fairly easily. Snapshotting a VM preserves a particular state of the machine so we can return to it if needed later on. It's often a good idea to take snapshots of VMs before upgrading or before installing something big or before making configuration changes that you may want to roll back easily if something goes wrong. Cloning a virtual machine, on the other hand, makes a whole separate copy of a virtual machine, which is helpful if you need to start up a second version of a guest, but it's not very efficient for making backups or checkpoint states. First let's take a look at making snapshots. Here in my Virtual Machine Manager, I have the graphical console for a guest open, and I'll switch over to the snapshots view under the View menu. To make a snapshot of the current state of the machine, I'll click the plus button in the lower left corner…

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