Installation of Oracle Virtual Box

Download Oracle Virtual Box at  Virtual BOX download

Creating the virtual machine

Start Oracle VM VirtualBox Manager and select Machine → New from the top menu.

Give the virtual machine a name (mine is called “Database 12c” or 11g ), set its type to Linux and the version to Oracle. Click Next

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Set the amount of RAM to 2048 MB and click Next.

Leave the “Create a virtual hard drive now” option selected and click Create.

Leave the HDD type to VDI and click Next.

Leave the allocation type to “Dynamically allocated” and click Next.

Name the disk “Oracle Linux Root” and set its size to 20 GB. Click Create.

This is the final step of the VM creation wizard, so you should see the newly created VM in your list of virtual machines. Select the machine and choose Machine → Settings from the top menu. This will open the Settings screen where we can setup additional resources.

Select Storage from the list and then select Controller from the storage tree. Click the Add hard disk button (that’s the one that looks like a set of disk plates with a green plus sign on top of them).

You should now see two disks attached to your SATA controller. Time to attach the Linux ISO.

Select the Empty item under your IDE controller and then click “Set up the virtual CD/DVD drive” button (the one that looks like a CD, next to the “CD/DVD Drive” drop-down list). This will open a list of commands. Select “Choose a virtual CD/DVD disk file” from the list.

The ISO image appears under your IDE controller.

Our final task is to set up the machine networks, so you can comfortably interact with it while still having internet access from inside the VM. Click Network from the list on the left.

Set Adapter 1 to “Host-only Adapter” and make sure the “Enable Network Adapter” option is checked. Then click the “Adapter 2” tab.

Enable the second adapter and set its “Attached to” option to NAT. Click OK.
The virtual machine is now fully configured. Time to boot it up and start the Linux installation.