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I have installed Ubuntu 12.04 on my Virtual Machine[VirtualBox] and I want to do some modifications in it. But I can't predict how it can influence on my system. What it the best practice to backup it?

It's clear that I can just backup my Virtual Machine but I don't know if it's a good practice?

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There's no problem in backing up your vm. You can also make snapshots –  LnxSlck Sep 11 '12 at 12:24
    
It's great. But it's a pity for me that you are posting an answer as a comment but not as a real answer. –  viakondratiuk Sep 11 '12 at 15:30
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up vote 3 down vote accepted

Best practice for this is usually using snapshots, a feature provided by many virtualization hypervisors, including VirtualBox. One can revert to earlier snapshot within seconds to get back to the point of taking it.

For a consistent and quick snapshot I recommend you shut down the VM before taking the snapshot.

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It's great, I didn't know about such functionality. Thank you very much. –  viakondratiuk Sep 11 '12 at 15:29
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