VirtualBoxの使用方法：ユーザーガイド

特定のキーの組み合わせは、常に自分のコンピューターによってキャプチャされます。たとえば、 CTRL + ALT + DELを押したときにキャッチすることに専念する重要なWindowsプロセスがあります 。 VMのキーコンボを押そうとすると、ホストOSでのみアクティブになります。

これらのキーコンボを挿入するには、入力に移動します VirtualBoxのメニューのタブ。 Select Keyboard and you can choose to send a few different key combos, like CTRL+ ALT+ DEL and Print Screen 。

Take a Screenshot

You probably have a screenshot tool installed already on your own computer. But you can grab a screenshot of your VM without fiddling to get the exact dimensions. Just press the right CTRL key (which VirtualBox calls the Host key) and E together to capture a full-screen screenshot. Then you can choose where to save it.

Using Snapshots

Given the nature of VMs, you'll probably want to do some potentially dangerous activities in them from time to time. Next time you want to test a suspicious file or perform a Registry hack, take a snapshot of your VM first. This lets you easily return to a clean state without having to reinstall your OS.

You can take a snapshot whether the VM is running or not. To snapshot a running VM, go to Machine> Take Snapshot in the VirtualBox menu bar. Add a name of the snapshot (like Before testing fake antivirus malware ) and a description if that will help you remember more about it. OKをクリックします to save your snapshot.

To snap a closed VM, select it from the VirtualBox main menu. On the right side, click the Snapshots ボタン。 Then, click the camera button to add a new snapshot. You'll have to add a name and description here, too.

Once you've saved a snapshot, you don't have to do anything more until you want to restore it. Let's say you're testing something for malware and your VM becomes corrupted. Shut down the machine, then select its entry in VirtualBox's main menu.

Click the Snapshots button on the right side again, and right-click the snapshot you want to restore. Choose Restore Snapshot 。 You'll see a notice offering to save another snapshot of the current state. Chances are that if you're restoring a snapshot, the current state of the machine is screwed up. If this is the case, uncheck the Create a snapshot of the current machine state box and hit Restore 。

After restoring a snapshot, next time you load up your VM, it will be exactly as you had it when you took the snapshot. It's pretty handy.

Share Folders and Clipboards

For better compatibility, you can enable a few features that let you easily move information between your own PC and the VM. Click Settings on a VM, then on the General category, open the Advanced タブ。

Here, you can enable two options:Shared Clipboard and Drag'n'Drop 。 Sharing your clipboard lets you copy and paste items between your host OS and the VM. Enabling the second option lets you drag a file from one machine to the other to copy it.

Both provide four choices:Disabled , Host to Guest , Guest to Host , and Bidirectional 。 If you want to use this, there's no reason to pick anything other than Bidirectional as it's the most convenient. Once you save the preference, simply drag a file from your own PC to the VM to make a copy.

VirtualBox also offers a Shared Folders オプション。 With this, you can allow access to specific folders on your PC from your VM. For the casual user, though, dragging and dropping should suffice.

Shutdown Options

You can shut down or restart your VM using the OS's built-in shutdown option. But you can also visit File> Close for some additional shutdown options. You have three:

• Save the machine state: Selecting this option will "freeze" the VM's current state to your hard drive and close it. Next time you start the VM, VirtualBox will pick up exactly where you left off. This is a bit like to putting your computer to sleep, except the saved state will persist until you re-open the VM.
• Send the shutdown signal: This is equivalent to clicking Shut Down in the VM's OS. Choosing this option will tell the VM to shut down and execute a clean shutdown cycle.
• Power off the machine: Powering off the machine is like pulling the plug on a real PC, instantly killing it. You can use this if a VM is frozen, but don't do so unless you have to. The system will have to inspect the virtual disks and pulling the plug when the OS is busy could result in lost data.

Editing VM Properties

Most of your VM's properties aren't permanent. Click a machine in the VirtualBox main menu and choose Settings to review its options.

In the System category, you can adjust a VM's RAM. If its performance stutters, try giving it a bit more assuming your PC has enough. On the Processor tab, you can dedicate additional CPU cores if you really want your VM to soar.

On the User Interface left tab, you can change the options that VirtualBox provides in its menus. You might want to enable the few that are left off by default so you have every control at your fingertips, or remove some to reduce clutter.

How Do You Use Virtual Machines?

Now you know everything you need to use VirtualBox effectively. We've covered installing and configuring the software, creating virtual machines, downloading new operating systems, and setting them up for first-time use. You can even download pre-built virtual disk images for VirtualBox to save some time.

At this point, you're only limited by your own creativity. What will you use virtual machines for? Test a new operating system, have fun breaking everything, or just try some OS-specific software you've never experienced. VirtualBox makes it easy, and we hope you have fun with virtual machines.

For a totally different use of VMs, try creating a VM clone of your PC's hard drive.

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