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Getting Started with Oracle VM VirtualBox by Pradyumna Dash

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Virtual machine snapshots

Snapshots help to save the exact state of a guest VM for later use. At any point in time, you can easily revert to the previous required state even though you may have changed the guest VM. It's similar to the saved state but many states can be preserved.

A snapshot not only preserves the complete state of all the virtual disks that are attached to the guest machine but also stores a complete copy of the VM settings, including the hardware configuration in an XML text file. Thus, when you restore a snapshot, the VM settings are restored as well as all the configuration files are stored in the XML format, so it takes very little space to store all the information.

When a snapshot is taken while the VM is running, the memory ...

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