From the version 2.0 VirtualBox supports 32 and 64bit host and guest operating systems (if you want to install 64bit guests your processor must support hardware virtualization and, of course, the host operating system must be 64bit as well).
Method 1:
Step 1: Open up the Terminal (Applications > Accessories > Terminal) or Right Click —> Terminal on desktop.
Step 2: Open /etc/apt/sources.list file.
geek@geeksite-PC~/$ sudo vi /etc/apt/sources.list
add the following line in to that file.
deb http://download.virtualbox.org/virtualbox/debian oneiric contrib
Step 3: Install the VirtualBox 4.1. Command As follows.
sudo apt-get install virtualbox-4.1 dkms
Note: dkms package ensures that the VirtualBox host kernel modules (vboxdrv, vboxnetflt and vboxnetadp) are properly updated if the linux kernel version changes during the next apt-get upgrade.
Sep 4: Start VirtualBox by issuing following command.
geek@geeksite-PC~/$ virtualbox
Method 2:
Step 1: Open Software package manager ( Mate Session – From Menu).
Step 2: Search for oracle virtual on the top right corner.
Step 3: Click on install button.
Step 4: Start VirtualBox (Mate Session: Menu —–> System Tools ——> Oracle VM VirtualBox
The following screen shot shows Oracle VM VirtualBox Manager, here you can manage all the virtual machines.
That’s all. you have successfully installed VirtualBox on Linux Mint 12.